The New Detectives: Case Studies in Forensic Science

For homicide investigators, it's a race against time when they track their deadliest foe: a serial killer who murders to feel alive.

When a killer turns a gun on a victim, ballistic analysis is key to cracking the case. Each shot fired leaves behind its own clues, allowing scientists to target murderers with deadly aim.

When theft is committed, something valuable is stolen. But when a criminal needs a new identity, theft becomes lethal.

Sometimes, seemingly small and insignificant clues, such as three hairs, microscopic fibers or a paint chip, become a victim's silent witness and help solve even the most baffling cases.

When abduction turns to murder, forensic science is a vital key to finding justice for the victims of a kidnapper's deadly intentions.

The tread of a tire, a single shoe print or even the shape of a bruise can help investigators track down murderers.

Investigators rely on forensic odontology, the examination of dental evidence, to identify a body from a single tooth and to catch two ruthless killers from their bite marks.

The law enforcement agency of the United States Navy and Marine Corps uses forensic science to solve perplexing murders and fulfill their motto.

Years after a murder has been committed, investigators use modern technology and advanced DNA analysis to shed new light on crimes that have gone unpunished for far too long.

Forensic scientists find clues written in blood as they investigate the murders of three women who were killed by men who once loved them.

The elements of nature can reduce a body to bones in a matter of weeks. Combining art and science, forensic anthropologists can give victims a face long after they've been forgotten.

Sometimes, the wrong people are punished for crimes they did not commit. Forensic scientists use DNA analysis to overturn convictions of these innocent men and women who have spent years behind bars.

A teenager is abducted on a shopping trip. Two hikers go missing on the Appalachian Trail. A grandmother never returns home from work.

A millionaire is murdered for a stash of buried treasure. A young woman dates violent men, only to be killed by her best friend.

For the forensic entomologist, insects that nest in corpses are like witnesses to the crime. By studying their behavior, scientists learn everything.

Photography has long been a fundamental tool in homicide investigations. A single image can hold enough information to identify a suspect.

When teenagers are driven to kill, their victims are not the only ones to suffer from their violent crime.

Philadelphia's Vidocq Society is one of the world's most unusual crime-solving organizations: a members-only club made up of forensic professionals.