Double Helix | FULL EPISODE | The New Detectives

Investigators in Canada are on the trail of a killer. The key lies in the victims' cells, but when the fire destroyed all the evidence at the crime scene, a handful of cigarettes provides the only clue. Will forensic

detectives

be able to uncover his secret? This young man was imprisoned. for a rape he swears he didn't commit Can science prove him innocent When the police are stumped They can turn to

detectives

in lab coats to uncover clues hidden inside the human cell A strand of DNA can identify a murderer or free the innocent the new one? The way crime detection is a

double

helix

In July 1991, a janitor in Vancouver, British Columbia, made a routine trip to the dumpster, but what he found was far from routine: inside was a burned body so completely that he wasn't sure if it was human he ran into.

Call the police across town, detectives Cat Lee and Ric Crook responded to the call, homicide investigators had performed this drill before what may look like a human body sometimes turns out to be a prank, a discarded mannequin or some other case of mistaken identity, they hope. That was Paul, they had yet to check it, so when we approached to take a look inside the dumpster, there was only the outline of a human body and, in fact, it was so destroyed by the fire that it was questionable. Whether it was human or we've had a few cases of bear carcasses destroyed after illegal hunting or something like that and we didn't rule out that possibility, the officers approached the dumpster care

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y taking note of details that might become important later in the container.

It was cold to the touch when they arrived the fire had been out for hours a stain spread from the corner to the pavement whoever started the fire used more than enough flammable liquid to destroy the contents a close inspection of the contents confirmed that it was not a false alarm there, Among the ashes of computer cases, wooden floors and scraps of paper lay a human body. After the detectives took their notes, the delicate removal of the fragile evidence began, they gently placed it in a body bag so as not to damage it further. and then he left. to the morgue where a pathologist would examine the body for clues to its identity.

Anything else that survived the fire was also collected and sealed. Upon inspecting the scene, detectives realized that the killer selected his location care

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y. An industrial park closed for the weekend surrounded by weeds and trees. in fact, we established that people were driving around around the time we think the homicide or the fire occurred and there was nothing that could have easily driven here and probably come out without really seeing what they would have thought. It was a fire Homicides are often solved in the first 24 hours as investigators follow important leads, but in this case the fire had gone out, the trail had gone cold.

If the murder occurred only five years earlier, thief Lee would have been killed. based solely on hunches. and his talent for controlling a case until they had the answers, but in 1991, when this victim died a criminal and Kathleen learned they had an ally in the lab, a powerful new crime-solving tool had been added. DNA profiling researchers no longer needed a shred of evidence. To solve a case they only needed a cell as personal as the worlds and lines of a fingerprint, but much more difficult to hide. DNA is the next wave of scientific research. Today, scientists can extract DNA and a sweat-stained hat left by a nervous killer.

From the saliva on the stamp of an extortionist's letter or from the dried blood or scraped skin under the victim's fingernails, criminals have always left microscopic evidence only with the advent of DNA profiles, which become incriminating. DNA or deoxyribonucleic acid contains all the details that make you human, no two people will accept that identical twins share the same patterns. DNA is small enough to fit inside the nucleus of each cell. Its shape is a

double

helix

like a spiral staircase wrapped around a column. Uncoiled, the double helix would stretch up to eight feet, about 99.5%. Everyone's DNA is the same, but some sections vary greatly from person to person.

By studying those sections, scientists can identify victims and unmask killers. At the Virginia Division of Forensic Sciences in Richmond, Paul Ferrara directs one of the most progressive DNA testing labs in the country with the sensitivity of this technology I don't know if I could go in and commit a violent crime and somehow not leave something of myself behind and that's all it takes with this technology, just a little part of me that has a cell with a there is a core in it and I'm in serious trouble he is the enemy of DNA and fire is the nightmare forensic investigators trying to recover DNA from burned crime scenes a week after the victim was found a criminal and the firefighters recreated the inferno to see if it could shed any light on the crime, whether by intention or accident, the murderer left a lid open creating a downdraft inside the dumpster, fast air whipped the flames in a frenzy, the surrounding trees hid what little smoke the fire produced, it burned at about 2,000 degrees for In comparison, 30 to 40 minutes, a crematorium burns at 1,000 to 1,400 degrees for about three hours.

The police were lucky to have remains now that they had to find out who was murdered here. All the pathologist could tell them was that the victim was white. traditional female methods in a stalemate detectives focused on x-rays that showed the victim was shot in the head but also reveal characteristics in Texas that would identify her David Sweet a forensic odontologist or dental investigator worked on the case the teeth They are the hardest substance in the human body and the most difficult to destroy when the bodies cannot be easily identified dentists look at the teeth to inform them about the victim, their where and their condition they can contain the story of a person's life, whether he was right or left handed. fluoridated water as a child or wearing braces when studying the victim's teeth, it was determined that she was in her early 20s and had an extraordinary feature, but the other thing we realized when we examined the teeth was that there were an extra tooth right in the center of the upper jaw between the upper central incisors and those showed up very well on the x-rays that were taken after the victim's death.

The offender conducted a computer search that compared his findings to missing persons' dental records, none of which matched despite his best efforts. He was stuck, he still had a nameless victim and a murder with no suspect, meanwhile, somewhere, a killer was running free, confident that nothing could link him to his crime, what he didn't know was that a little evidence could provide the link. lost. For two days, Detective Al Khali chased a ghost, who was the woman in a dumpster, what terrible chain of events led to her murder, surely someone, a friend, a lover, a co-worker, was already missing to his cat.

He li asked his staff for missing persons reports. One standout was Lynn Breeden, 30, her roommate who reported that she had left her at a friend's house. Her friends saw her leaving a nightclub around 3:00 a.m. m. The night before the woman was found burned, she left with an unknown man three days later. a woman posing as Lynn Breeden tried to empty her bank account the woman presented a withdrawal slip with Breeden's account number the teller knew she was not who she said she was when she questioned the impostor the woman became nervous when the teller tried to stop As the woman rushed out, a security camera captured the failed transaction.

Analysis of the film revealed that a man was waiting for the woman in the parking lot. The police took a photo of the woman on the tape and published it in the newspaper. They identified her and called her for questioning. She told police that a friend had offered her five hundred dollars to defraud the bank. She didn't know anything about the murder. The friend was Chris Cruz, an exotic dancer who used the stage name Toni Devon. Toni Devon's detectives put him under constant surveillance and then asked him to come talk. Unaware that the police were watching him, Cruz parked his car two blocks from the station and walked the rest of the way.

Surveillance officers called Sergeant Crook to tell him they thought Cruz must have been hiding something in his car when crews arrived at the station. When they asked if they could search his car, he told them that the car was at his parents' house in another county. They knew he was lying. They told him they knew where he parked it and didn't need his permission to search it. Reluctantly, he handed them the keys. Forensic investigators took photographs of the car from all angles and carefully recorded what they saw before touching us. They approached to gather more evidence.

They collected and photographed practically everything. It was too early to say what might be important. Later the men worked in teams. Some officers inspected. the evidence while others marked where it was found the investigators found blood stains on the sides and rear of the car they marked the positions carefully then the shape of the stains would be analyzed to calculate which direction the blood came from and its point of origin these details They are crucial to reconstructing a crime Blood samples can also be collected for DNA analysis Police search the car inside and out Look through personal items in the back seat in hopes of finding some evidence linking the victim to the car , it's 10:05 Let's get into the truck next, they opened the trunk, oh look at this, right inside they found gas cans and other objects covered in blood.

We need some clothes. They found several key pieces of evidence, a bloody tire and a .22 caliber rifle. I would say it's the detectives. Now we're almost sure the teams killed Lynn Breeden but they had no way of connecting the suspect to the victim. The teams denied knowing her. He told his friends that he bought his ID on the black market and the police couldn't To prove that the blood in the car was his, they needed to compare the DNA from the blood in the car with the victim's DNA, but where could they find the DNA? of the victim?

They asked David Sweet for help, who suggested looking for it in their impacted wisdom teeth. No one had tried it before, but it was his last hope. We know theoretically that there are still cells embedded in the mineral tissues of the teeth and we should be able to open the teeth, extract those cellular materials and extract the DNA from the cells. then process it into a forensic DNA analysis a tooth is an armored layer that surrounds a core of living tissue sweet expected the tissue inside the impacted wisdom teeth to be protected from fire by the thick jaw that surrounds them cut the first wisdom tooth from the crown to the root but he found no tissue inside his second attempt was more successful he found tissue but he didn't know if his DNA was destroyed by the fire he sent it to the lab to be analyzed all he could do was wait if Chris Cruz killed Lynn Breeden The answer lay in a forensic laboratory in Vancouver where the victim's tissue was eventually sent for analysis.

Sweet received the results. The DNA survived the fire. Additionally, additional testing showed that the victim's DNA matched the DNA in the blood in Cruz's car. The lab calculated the odds that it wasn't the victim's blood were one in a half. 540 million dr. sweet proved that Lynn Breeden was in the car the night she died confronted with overwhelming evidence Chris Cruz confessed to the murder based on interviews detectives construct a probable scenario of that fatal night. Sorry, Breeden once borrowed a lot of money from Cruz. Now he wanted to collect Breeden refused to pay him Cruz lost his temper, becoming more and more impatient She got out of her car The team hitter pushed her body into the truck and drove through the After he reached the secluded place the victim began to recover the Chris Cruz's conscience shutter thought the flames would erase all the evidence, how could he know that the murder charge would come from his victim's own mouth?

Found Guilty of Second Degree Murder Chris Cruz received a life sentence in rural Clay County, Alabama. A trip along Route 31 leads to a city caught between memories and progress where shops from the beginning of the century share a sign with a new town hall where people still receiveWord of mouth news and bad and good news travel at about the same speed as in slow summer it is a safe place where parents don't think twice before giving their teenagers free rein to explore the land a place where violence is an unwanted stranger on July 22, 1995 three drivers on all-terrain vehicles discovered a burned mattress in the forest and underneath what appeared to be blackened bones they contacted the sheriff of all Poland, who responded to the call do you think You have a friend three miles three miles east for nine clues mmm the men met the sheriff and led him to his grim discovery it seemed like he started the Toland murder to secure the crime scene but he knew he couldn't do it alone he needed to make sure no evidence was in danger.

I went down to the scene and saw exactly what happened, I saw the mattress charred and burned, there was nothing left with the springs still. and I just stopped everyone where they were and told him to stop right there. I asked him to go back to the road entrance and ask everyone to secure it. I went to the coroner and the criminalist to come and help us collect. All this evidence the man he was looking for was Angelo dela Manny a scientist from the Alabama Department of Forensic Sciences della mana you never know what you're going to find when you answer a call every time you arrive at a crime scene you expect it to have been secured and cordoned off immediately upon discovery of the body, you don't want anyone at the crime scene entering the crime scene, who doesn't belong there, you don't want anyone messing up the evidence, you want the evidence to be kept securely so that when you, As the scientist arrives there to retrieve it, you can pick it up without disturbing it, preserve it, bring it back to the laboratory and run the necessary tests to find out who committed the crime.

Della mana marked the position of the body, the state of the mattress. and his surroundings before going to work collecting everything he could from the Amana he placed flags to mark the position of the little evidence he found he marked 11 new cigarettes scattered randomly around the mattress they hadn't been there for long that was a good sign but who the murderer smoked them the victim I felt that it was going to be very difficult not only to identify that person but also to generate any type of evidence. I felt that cigarette butts were present at the crime scene.

There would be very strong evidence because they did not look to see if they were sitting. above the grass cushion felt like they hadn't been there for long while Dell Amana assessed the situation, their technicians recorded the evidence, since the technicians don't want to leave part of themselves wear gloves, the people at Della Manas had been trained to that. If forensic scientists are careless in how they collect, store, or process evidence, they will become vulnerable to attacks in the courtroom after technicians mark, photograph, and They recorded the evidence carefully. They picked them up, the bodies don't appear without someone missing them.

Sheriff Toland already had a sinking suspicion about her. The victim was the week before Jimmy Parris called him to report that his wife Peggy Laughlin was missing. Sheriff Toland decided it was time for his deputies. to make a call to Parris, you can't think of anywhere else she could have gone, it was no secret in town that the couple had more than their share of fights, no one would be surprised if Peggy just decided to get up and Meanwhile , the medical examiner compared the victim's spine to x-rays of Peggy Laughlin's spine. They agreed. Jimmy Paris became the main suspect, but where was the evidence?

Paris denied having been near the forest that night Della Mana tried to put the pieces together but didn't. I don't have enough to complete the picture the forensic team found nothing at the crime scene the cigarettes were the only clue that was not touched by the fire the answer must lie with them the detectives told him that both Peggy and Jimmy smoked you may be watching a case and I feel like there's not a lot of evidence there, investigators don't think there's much to work with, but when you as a forensic scientist find that little piece of evidence, that link can catch the suspect or clear up a falsely accused individual the rush What comes out of that makes all the long hours worth it if I could extract DNA from cigarette filters I could compare it to Paris and Laughlin's DNA if I could prove they were in the woods together Poland could file a case against Paris della Manish and an ultraviolet light on the cigarettes revealed the saliva-soaked areas.

DNA can be obtained from saliva and lip cells. He marked the outline of the shiny part he wanted to try, then carefully cut it out and sent it off. We took it to the lab to do a DNA profile and build a DNA profile. The first thing we do is take our evidence sample, blood or saliva or whatever the DNA contains. Well, what we do is we open the cell and release the DNA to extract the DNA from whatever is there, we clean it up and we look at specific areas or directions on the DNA and we make millions of copies of that area big enough that we can See it once the DNA profile is done for each person in the event that they can then compare it to the evidence DNA profile and see if there are any matches there.

He was encouraged by the results: The lab identified DNA from two people, and two of the cigarettes contained DNA from both people, meaning they shared their cigarettes. della man approves that those two people were Jimmy Paris and Peggy Laughlin testing Paris's DNA was simple, cooperating with the police, he gave a blood sample that provided enough DNA to analyze, but obtaining Lofland's DNA proved much more difficult. dela mana had to try to extract it from the remains of him. I felt the best place to look for the DNA was in the marrow of the femur or the femur, the largest bone in the body, is the one most likely to have protected the DNA from the fire.

Bone marrow is rich in DNA to expose as many cells as possible. mana crushed it into powder, she gave the powder to another scientist for DNA extraction. Scientists place the powder in a chemical bath that breaks down the cell nuclei and releases the DNA once the DNA is in solution. The bone fragments must be removed of chemicals and impurities. The liquid passes through a series of microscopic filters A centrifuge spins the debris Filters trapped between DNA Scientists can theoretically obtain DNA from a single cell, but to create a profile they typically need thousands, although that number is declining not long ago. many tests required a sample the size of a dime today they can extract usable DNA from a drop of blood the size of the head of a pin the DNA is isolated now is the time to measure it when the DNA is extracted to Amana examines the results that appear as small dark bands on a piece of film.

DNA is measured in tiny quantities called nanograms, or billionths of a gram. The test results tell you if you have enough DNA to work with. Unfortunately, there are only about 0.3 nanograms of DNA in that sample, that's the point, and then 9 zeros and 3 grams of DNA in that sample. . Della mana did not have enough usable DNA for testing, but she received a dose of this 25, a scientific process. revolutionary, its inventor Kari be Mullis won the Nobel Prize until 1993. Scientists could test DNA only if they had large quantities, but bacteria, heat and time take their toll by degrading the DNA and leaving it in fragments, a process called PCR or chain reaction.

Polymerase allows scientists to make multiple copies of DNA DNA is made up of four chemical units adenine a thymine T guanine G and cytosine C these units are strung together like beads A binds only with T and G binds only with C PCR works By splitting the double stranded DNA like a zipper, the thermocycler heats the DNA separating the A from the T and the G from the C, essentially opening the helix toward the center, adding more of these chemicals to the solution and the two halves of the propeller use them to complete themselves. repeat the process and the two become four and so on until millions of copies are created and the sample can be measured by making a DNA profile.

Scientists do not need to compare the entire DNA molecule, they only look at various sites along the helix if these sites are the same in both samples. The DNA most likely came from the same person. It is considered a coincidence. The scientists used PCR to create enough DNA from the bones to make a profile, but the quantity and quality of the DNA was poor, so they could only measure one. site but to make a match they needed to identify at least two sites, how could they find that second site? Dell Amana knew that a child's DNA is a combination of both parents' DNA to solve the murder of PEGI Lachlan.

Dell Amana needed help from her brothers and sisters, if she could make her profiles, then she could work backwards and calculate Peggy's. Once we knew we didn't have enough DNA to build Peggy's full DNA profile, we had to go and get a blood sample from each of her brothers and sisters who were in the United States, these samples came from all over the country. the United States while the Della Mana investigation continued. Sheriff Toland received a call about an abandoned pickup truck found in a neighboring town. A check of the license showed it belonged to Jimmy Paras.

Inside, forensic scientists found blood on the ceiling and walls, part of the carpet had been torn away. I tell you what man above your head, right above your head. Wow, yeah, I got three to watch it. Based on this evidence, they obtained a search warrant for Paris's house agents, they searched the house for clues that could link it to Paris. until his wife's death they found nothing then an officer searched the crawlspace found a piece of blood-soaked carpet that matched the missing piece from the Paris van like a puzzle possession of the carpet linked in Paris to the van Bloody, the police had the crime scene, they had the victim, and they had the suspect.

The evidence was strong enough to arrest Jimmy Paris for the murder of his wife, but to strengthen their case for conviction, the police needed to bring Paris together. the van and the burned mattress to make Paris had to be placed with the victim just before her death Angelo de la manna was hard at work trying to get him ready to do Peggy's DNA profile using her blood samples. brothers we extracted from them we subjected them to our full battery of DNA tests. and what we did was when we got the DNA profiles of the brothers and sisters we were able to work backwards and build the rest of Peggy's profile.

The genetic information della mana collected from the brothers allowed her to complete the missing link in Peggy's DNA. The DNA matched the DNA on the cigarettes here. Peggy was shown to be alive with Jimmy in the woods the night he died. Four forensic experts Paul Ferrara with a DNA match was the type of evidence that tipped the scales against Jimmy Paris when the DNA evidence was analyzed in the weight that is given to that DNA evidence, take it and put it in perspective with other evidence of motives, means and opportunities, and when all of these are combined, then one can arrive at an informed opinion that a person is guilty beyond a reasonable doubt.

Paris had the motive, the means and the opportunity to kill Peggy Laughlin he was a jealous man he had begun to suspect that Peggy was unfaithful that night he invited her to the woods he brought a mattress, placed it on the floor and covered it with a blanket Peggy and Jimmy was smoking and talking casually, throwing aside the spent cigarettes, they were in the saliva and the lip cells lay the identity code of the murderer waiting to reveal his secret, then something happened that triggered a rage that led Jimmy Paris to the homicide and recently had to destroy the body.

If you wanted to escape detection, he probably thought that if the police couldn't find a body they couldn't link him to the crime, you couldn't see that the evidence he had already left behind would be enough to convict him. The DNA analysis was crucial in the sense that it represents both the suspect and the victim at the scene together and in that case having those small pieces of evidence allowed us to jail a guilty man and allow the family to put an end to a terrible incident in Alabama and Vancouver scientists struggled to find DNA evidence linking a killer to his victim, but the power of DNA is not only its ability to put people behind bars, it also holds the key to setting them free.

Attorney BarryScheck, part of OJ Simpson's criminal defense team, doesn't believe everyone. behind bars he is guilty using DNA he is doing a solid verification of the case he heads the Innocence Project a program at the Benjamín Cardozo School of Law in New York the program is dedicated to exonerating innocent people through DNA profiles he responded we have something but we don't enough to perform testing verification provides experience students do the legwork examining hundreds of cases looking for those with the most promising once cases are identified students investigate whether the evidence still exists if so see if it can be used for testing of DNA I don't know if it exists It was not clear to us that DNA had the power to go back to old cases, re-examine it and exonerate people who had been convicted many years ago and who many people considered innocent.

The Innocence Project helped exonerate 30 of the 40 people. released through DNA since the project began in 1992, today the FBI's astonishing statistics show that between a quarter and a third of all DNA tests in its laboratory clear a suspect; No one knows how many innocent people remain in prison in the United States, but the Innocence Project is doing everything it can to find them. Now we have all these cases of people who have been convicted who can credibly come forward and say, look, I didn't commit this. crime, serological evidence was presented against me, hair evidence was presented. against me, for example, please prove the elements in my case, it will prove that I am innocent and that is happening case after case after case Louise Hochberg is the executive director of the Innocence Project in 1993, a convict named Troy Webb appeals to his colleagues to to help you with it.

DNA to prove he was innocent, a brave Troy Webb first wrote to us in 1993 and I understand from Troy that the way it got to us was through his cellmate, who apparently was also a client of the Innocence Project . Webb was arrested in 1988 after a rape. The victim selected him from a series of photographs. Eyewitness identification has led to the majority of convictions in which the defendants later proved their innocence through DNA profiling. Hochberg believed in Webb's innocence, but it would be three years before she and her students returned him to her family in Virginia Beach, Virginia.

The criterion for us is number one: can this person make a credible claim of innocence? and number two, the most important, is his biological evidence, in case we can carry out tests, which combined with other factors will be decisive, they will prove that this person did not commit the crime. for which he was convicted, the Innocence Project sent evidence from the case to Paul Ferrara's forensic laboratory in Richmond. Their scientists compared DNA from evidence left at the rape scene to DNA from a blood sample from Troy Webb. The technology level is even ten. Years ago it was such that we couldn't eliminate Troy Webb, for example, as a possible contributor to the genetic material, but by the same token we would have been able to eliminate a large percentage of the population before they could begin the testing process that the lab had done.

To recover genetic material from the evidence warehouse seven years earlier, once identified, they had to see if it contained viable DNA. They used an acid test to confirm that the biological fluid was present. If fluid is present, the indicator fluid turns purple. Another method is to use a light source called omnichrome that makes fluids glow. If the scientist is looking for blood to test for DNA, he will use a chemical called luminol to find it. Luminol can detect the slightest trace of blood, making it especially useful in cases where the blood may have been washed away by rain or where a murderer has attempted to remove it.

In the Troy Webb case, investigators sample the evidence. from the victims' clothing the sample would contain the perpetrator's DNA they will compare it to Troy's DNA comparing the DNA is a matter of comparing the lengths of the genetic strands they code for at specific points in the double helix scientists place the sections of DNA that They want to compare in a gel. DNA has a negative charge, so scientists can use a positive charge to pass it through the gel. Longer pieces travel slower than shorter pieces. Two pieces of the same length would move the same distance if the DNA from the evidence and the suspect moved the same distance through the gel.

Scientists know they are the same length and have a match if the segments do not move the same distance. they could not belong to the same person the lengths of the segments can be seen and measured under lights that make the DNA fluorescent these are the printouts of the actual DNA profiles in the Troy Webb case they fade over time so scientists take photographs or a permanent record scientists needed to compare only one site on Troy Webb's DNA chain to the DNA in the evidence, if it didn't match he couldn't have committed the crime 4.2 4.3 in addition to comparing Webb's DNA to The evidence is also compared to the victim's DNA. and the rapist the dot patterns make two differences between the perfectly clear DNA none of the DNA matches the DNA in the evidence this type of DNA did not come from Troy Webb and a real rapist in this case is still on the run right now on the 7th September. 1996 the Innocence Project published the results in Virginia where new evidence cannot be presented more than 21 days after the sentencing the only option was a pardon the governor reviewed the petition and granted the pardon there is no greater good that a lawyer can do for me trial and then look back at old cases and if it can be proven and that an injustice was committed write it October 16, 1996 Troy Webb walked out of prison a free man the first thing he wanted to do was eat a 7 foot Philadelphia submarine sausages now works at the sub shop He has made new friends and reestablished a bond with the family He lives with the same faith and hope that kept him in prison and is grateful to the Innocence Project I really like family, you know, because one For them I'm probably still locked up, you know, but they helped me.

Know? For free. You know, you can ask for a lot more. All hope is not lost in catching the real rapist. Virginia has amassed the largest DNA database in the country. Collecting blood samples from every convicted felon, tens of thousands of blood samples arrive each year, creating a backlog of more than 135,000 samples in cold storage from the nearly 10,000 DNA profiles in the data bath. Virginia has already solved 18 crimes by comparing DNA from the crime scene. If the DNA from the case can be compared to the DNA in the data bank, the rapist will be found. our DNA data bank here was one of the first created.

I think we had one result in 1993, none in 1994 and then five in 1995. Twelve in just 1996 and the database, even in 1996, only had less than nine thousand profiles of those one hundred and thirty thousand samples that we have when we get to the At the point where we have profiles of convicted criminals, all one hundred and thirty thousand of them, the number of these hits will skyrocket dramatically to the point where they will become common if you are innocent of a crime. DNA technology is your best friend, your best ally, but conversely, if you are guilty, it is your worst enemy.

DNA profiles have tremendous power for a technology still in its infancy. In its first ten years, the tiny double helix has quickly become one of the new detectives' greatest allies in bringing criminals to justice and delivering justice. to the Hennessey.