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A torso washes up on a river bank; a passer-by stumbles upon a human finger in a dumpster.
Police search for a missing college-student; women are left for dead in the middle of the road.
An in-depth look at the science of death; the firsthand techniques and methodology used by coroner investigators.
Rescue workers scramble to save a couple trapped in a crashed car.
A rare technique to lift fingerprints off the victim's body helps to solve a murder case.
Firefighters find a woman's charred body in the rubble of a house fire.
A woman vanishes; a hotel's night clerk is brutally murdered.
Police search for a 22-year-old college student whose car was found abandoned outside Philadelphia; 10-year-old boy missing in Illinois.
Co-workers are murdered in a bar, and police follow clues to find the killer.
A woman is a victim of arsenic poisoning.
Coroners try to identify a body that was burned in a car fire.
Authorities suspect an ICU nurse of murdering patients.
Police suspect someone was hunting illegally and fatally shot a man found dead in the front seat of his car.
A 10-year-old girl disappears.
A Russian woman is killed in her home; police search for a box whose contents may prove a man guilty of his wife's murder.
The home of a prominent couple becomes the unlikely scene of terrible bloodshed; a woman vanishes, leaving only a spray of blood.
A teenage runaway enters a deadly relationship with an older man; human skeletal remains turn up in a zoo.
A Virginia real-estate agent misses an appointment and is never seen again.
A woman accepts the job of a lifetime, then disappears; a college student is murdered on her way home from work.
A murder victim's husband is accused of hiring co-conspirators to kill her.
Screening bodies for toxins helps identify the true cause of death.
Victims' families and friends can provide crucial information in investigations.
Killers sometimes disguise their crimes as accidents.
Everyday substances reveal hidden clues that break a homicide case.
Some multiple-murderers seem to choose victims at random, without an apparent connection.
Killers hide the remains of their victims.
The most obvious suspect is not always guilty.
Strangled prostitute; a stranger kills a woman in a van; a serial killer runs over his victims' bodies.
Police rely on forensic science to reveal murder victims' pasts and expose those guilty of committing crimes of passion.
Forensic scientists must work to prove murder when the victim's body is missing or destroyed.
The mysterious abduction of a young mother ends up a brutal homicide.
An office party takes a violent turn.
Plastic, industrial tie-wraps lead police to a killer.
Forensic examiners uncover proof of murder when killers choose to hide their victims when committing crimes.
A woman and her daughter become lost at sea.
A fire hides a more horrific crime; a serial killer turns arsonist.
Forensic science holds out the hope for justice when innocent victims are caught in a killer's crosshairs.
A parolee dodges prison by stealing the identity of a murder victim; a suspect conceals a crime by assuming the victim's identity.
When a woman is found dead after a date with a co-worker, analysis of her stomach contents leads to the man's arrest.
A Florida girl's murder is similar to one in Indiana; DNA evidence forces a suspect to confess.
A suspicious-looking man buying a sports car turns out to be a killer; a chat room holds the key to a student's death; a couple kills three restaurant patrons.
A suspect's shoe print matches one left at the crime scene; a bruise on a victim's body resembles the tread of a tire.
Investigators and odontologists match bite marks with dental molds taken from suspects.
The Naval Criminal Investigative Service delves into murder cases within the Navy and Marine Corps.
Diligence and technology help catch perpetrators who believe their crimes have been forgotten.
Forensic anthropologists use art and science to give faces to victims long after their bodies have been reduced to bones.
Blood evidence speaks for victims who cannot.
DNA testing can vindicate those unjustly accused.
Forensic artists turn witness statements into pictures as they try to recreate faces of killers.
Forensic entomologists can learn when a murder was committed as well as the weapon used by studying the insects that nest inside a dead body.
Photographic evidence provides investigators with a permanent record of killers.
Investigators dispute the innocence of teens involved in murders.
Crime writers tell of the efforts of homicide investigators.
The Vidocq Society provides investigators with fresh perspectives on cold cases.
A guilt-ridden police officer lies during an investigation; a man makes his wife's murder look like a car accident; a staged suicide.
Forensic investigators track down innocuous-seeming clues, such as dirty shoes or a tiny piece of plastic, placing a suspect at the crime scene.
A sniper is brought to justice through ballistic tests; a bloody hand print leads to a suspect in a double homicide; a semen sample is tied to gunman.
Investigators use forensics to find missing people.
Investigators use forensics to solve relationship tragedies.
Investigators study small clues left at the crime scene, such as a paint chip, saliva from a cigarette and glass fragments.
Toxicologists link suspicious deaths to the lethal administration of poison after studying blood and tissue samples.
Police unearth a landlord's gruesome crime after an elderly tenant disappears; police investigate a cold case and convict a serial killer.
Detectives use the remains of bones and teeth to identify murder victims.
DNA evidence surfaces years after a murder; boy disappears on his way to class; horrid police actions.
Murderers think they're invincible but make critical mistakes while trying to outwit the police.
Today's technology allows scientists to more precisely study victims found in water.
The solutions to the most atrocious crimes often hinge on the smallest of clues. Even with advanced technology, vision still remains one of the most important tools for forensic investigators. They must train their eyes to find the full story of a murder written in a single scrap of evidence.
Forensic investigators hunt down killers who choose their victims at random and artfully cover their tracks.
When solving brutal crimes, the forensic entomologist and botanist study clues provided by nature.
Murderers who use poison to do the dirty deed are ultimately betrayed by their motives, especially when they murder for money.
Without a body, investigators must turn to science to prove a crime was committed and catch a killer.
Investigators employ forensic science to nab the cold-blooded spouses who put an end to their marriages through murder.
Vengeful lovers.
Even though there is no statute of limitations on murder, a case becomes harder to solve over time as clues fade away.
Sometimes blood relations lead to bloodshed.
Investigators use forensics to unearth a murder among blood relatives.
Investigators face an arduous challenge when pursuing a serial murderer keen on killing again and again.
The investigators and scientists of the Bureau of Alcohol, Tobacco and Firearms crack federal cases involving drugs, arson and weapons.
Even in the wake of a catastrophic fire, investigators can cull important clues from charred rubble and bring the arsonist to justice.
Microscopic pieces of evidence -- a fingerprint or a few fibers -- left at the crime scene can lead to the conviction of such killers as David Middleton and Gregory Kokal.
Murderers with obsessions of love, jealousy or power.
Chaotic or clean, a murder scene will yield clues left behind by the culprit, as was amply demonstrated in the case of the "Night Stalker."
Murderers attempt to conceal evidence.
People who contract killings have airtight alibis, but investigators use forensic science to explode so-called perfect alibis.
As cocky serial killers become increasingly careless, investigators harvest the clues that will ultimately put them away.
Detectives follow the electronic crumbs left behind by cell phones, surveillance cameras and ATMs to track criminals.
Female killers tend to choose less violent methods.
Poisoners rely on their victims' trust.
When forensic scientists re-examine old, unsolved crimes, they sometimes find an overlooked clue or employ new technologies.
The role of the Texas Rangers, formed in the 1830s, continues to evolve with the application of medical jurisprudence.
Drug trafficking spawns a violent and deadly criminal underground.
Clues come from unlikely sources, including a beer bottle, deleted computer files and the cocoon of a black-fly larvae.
Crime writers combine perspectives of law enforcement and journalism.
Two of the top coroners in the United States talk about their cases, providing important insights into crime solving.
Psychologists discuss the behavior of serial killers while detectives talk about techniques used to catch them.
A body isn't always needed to solve a murder, as detectives can use a speck of blood or fingernail fragment to track a killer.
Forensic investigators are able to use an eyelash, a carpet fiber, a hair strand or even cat fur to nab killers.
A seed pod may be enough to lead detectives to a killer or a victim's body.
Toxicologists examine blood and tissue to uncover unnatural deaths.
Criminals' tools provide vital clues that can lead to their capture and prosecution.
Modern techniques help to solve old cases.
New forensic techniques assist investigators in solving cases and capturing criminals.
Arson investigators gather physical evidence and mount undercover operations.
By testing DNA from saliva on a mailing label, investigators were able to track down the World Trade Center bomber.
An FBI profiler gets inside the mind of a serial killer by piecing together the evidence left at a crime scene.
Photographs taken at a crime scene capture obscure clues and provide a permanent record.
Researchers investigate the importance of DNA analysis and its impact on the criminal justice system.
Forensic entomologists study the insects found on a corpse to determine the time and cause of death, providing crucial evidence.
Forensic artists form a face from an unknown skull.
Many people each year disappear without a trace and are never seen again.
New techniques allow investigators to find clues among charred remains.
The massive investigation into the attempted murders of federal judges in 1989, beginning with the killing of Judge Robert Vance.
New computerization techniques aid in the fingerprinting process.
Handwriting analysis can determine mood, motive, and many other psychological traits.
Flight data recorders give investigators vital clues about plane crashes.
Forensic evidence plays a vital role in the O.J. Simpson criminal trial.
Ballistics experts work to determine whether a shooting is suicide or murder.
Forensic anthropologists identify the remains of soldiers through DNA tissue matching.
The coroner's office in Miami investigates the death of an unidentified person when the body floats into a fishing boat.
Chemists at the Forensic Science Center at Lawrence Livermore National Laboratory develop new techniques to capture killers who use poisons.