The New Detectives: Case Studies in Forensic Science - Season 6 (2000)

A sniper is brought to justice through ballistic tests; a missing woman is identified through her dental remains; a semen sample is tied to a gunman.

Investigators use forensics to solve relationship tragedies.

Police use trace evidence and paint analysis to track a killer of gay prostitutes; a husband is linked to his estranged wife's murder by saliva and ink found at the scene.

Poison is an almost invisible form of death and is often interpreted as a heart attack or underlying health issue. But when foul play is suspected, toxicologists must look for hidden clues in blood and tissue to bring these murders to light.

Some people do get away with murder, at least for a while. Thrilled by their success, they tend to kill again and again. But with each crime they leave behind more clues for investigators. In this episode, two serial killers are profiled: Faryion Edward Wardrip who murdered five women in Texas, and landlady Dorothy Apuente, who murdered seven of her tenants.

At the scene of a murder, sometimes the only clues to the killer come from the victim. Forensic anthropologists use skeletal remains to decipher the clues written in the bones to bring the murderers to justice.

Time of death is an important consideration in a murder investigation but when a killer freezes, burns or even grinds his victim, even the most expert medical examiner would be at a loss about how to calculate a time frame. Forensics has its own techniques to solving these grisly crimes.

Accidental deaths, suicides, disappearances and fires: they're an everyday part of an insurance investigator's job. But these cases shouldn't be taken at face value. Forensics has become a vital tool in exposing insurance fraud.

Drowning deaths often look like accidents and over time water can destroy the few clues the killer may have left behind. Investigators must turn to forensic science to solve homicides in which the victims were found in bodies of water.

In May 1996, Ray and Fleta Holladay were worried about their daughter, Kathy Beadle. She had checked into a clinic in Toronto, Canada for cancer treatment. That was six weeks ago and they hadn't spoken to her since.