Explores three murder cases in which investigators secured convictions from trace evidence, including fingerprinting, fibre analysis and DNA testing. S4/Ep3
Features investigations in which natural clues, including insect bites, cat hair and a rare form of bacteria helped forensic scientists solve murders. S4/Ep4
Three cases illustrating the extreme measures investigators take to catch a killer when a missing person is presumed dead but no body can be found. S4/Ep6
Crime writers know as much about crime as any crime-fighter - or criminal. They can provide as near a first-person account of a murder as is possible. S3/Ep14
Poisoners: devious killers relying on their victim's trust in order to steal their lives. Find out why they don't usually stop at just one kill. S3/Ep9
No matter how clean a crime scene appears to be, the culprit often leaves something behind. Even a fingerprint or shoe tread can lead to a conviction. S3/Ep3
See how plants help provide oxygen and nutrients, but in a criminal investigation, they can also mark the time and location of a person's death. S2/Ep4
Poisoners: devious killers relying on their victim's trust in order to steal their lives. Find out why they don't usually stop at just one kill. S3/Ep9
The OJ Simpson murder trial captured the attention of the nation. Find out what forensics could and couldn't tell us about the trial of the century. S1/Ep15
Fingerprints are an indisputable, time-tested method of establishing someone's ID. New computerisation means identification can now take only minutes. S1/Ep12
Hiding a body can be tricky - it's sometimes easier to obscure the circumstances of death, turning murder into suicide or blaming it on someone else. S3/Ep4
Learn the ways that investigators are always on the cutting edge of new forensic techniques, helping them solve cases and catch criminals more swiftly. S2/Ep8
A man reports that his wife and daughter were lost at sea when his boat caught fire. Forensic study of the wreckage reveals that the fire was arson. S7/Ep10
When an office party takes a violent turn and a woman is harmed, forensic investigators must deal with conflicting accounts and unlock a vital clue. S7/Ep10
When a killer's dumping ground is discovered in Florida, investigators must confirm the identity of charred bones in order to solve the brutal crime. S7/Ep10
In Colorado the mysterious abduction of a young mother ends up as a brutal homicide. With few clues and fewer suspects, the detectives go on the chase. S7/Ep99
In most cases, the killer and victim share a personal history. But when a victim is caught in a stranger's deadly grasp, a crime may go unsolved for years. S7/Ep95
When a victim is killed at point-blank range, police assume that an acquaintance is to blame. In three cases, the murderer is not always the most obvious suspect. S7/Ep94
Killers often try to deflect attention from their crimes by hiding the remains of their victims. Visit two cases where bodies lay hidden for years before being found. S7/Ep93
Most victims of multiple murderers have a link with the killer or match their set of criteria. But some murders occur when victims appear to be picked at random. S7/Ep92
Sometimes, when a death seems to be accidental, it is up to forensic scientists to reveal hidden betrayals that reclassify cases from accidents to homicides. S7/Ep90
A victim's estranged spouse is often a key witness in a murder investigation, and when the body is found, family and friends can provide crucial information. S7/Ep89
When killers sedate their victims and disguise the crime scene, identifying the true cause of death is hard. What hard evidence is needed to help investigators? S7/Ep88
Police arrest two conspirators in a plot to kill a woman, but in a dark twist, they accuse the victim's ex-husband of hiring them to kill his ex-wife. S7/Ep87
When a missing teenager is found murdered, a piece of rope provides the only clue to the killer's identity. And, police struggle to build a murder case without a body. S6/Ep18
A makeshift coffin conceals a body - can insects help cops identify the corpse? Plus, a parasite expert proves murder when a woman is found in a dumpster. S6/Ep15
Dismembered human remains are found in a grocery bag on a riverbank - will detectives be able to piece together the victim's identity and catch a killer? S6/Ep14
A man is convicted of the murder of a little girl snatched during a game of hide-and-seek. After a 20-year campaign, could new DNA evidence set him free? S6/Ep13
When a makeshift cemetery is uncovered by a road, detectives realise a serial killer is at large. Will they be able to catch him before he murders more women? S6/Ep11
A man risks everything to find his sister's killer - can a sympathetic detective with a great theory help him? Plus, a sexual predator is getting away with murder. S6/Ep10
A woman, Betty, identifies a dead body as her missing sister Annie - but Annie is still alive. A look at murderers who kill to acquire a new identity. S6/Ep4
A motel clerk disappears, leaving behind a trail of blood. Investigators have their suspect, but without a victim, what can they charge him with? S1/Ep9
Just a few microscopic cells, from even a single hair or drop of blood, can place a murderer behind bars. What does DNA mean for crime solving today? S1/Ep6