A&E True Crime takes a look back at the horrific crimes of Canadian serial killer and 'Cold Case Files' subject Ronald Glenn West and investigates where is he now.

Dr. Thomas Andrew, retired chief medical examiner of New Hampshire and now a forensic consultant, speaks with A&E True Crime about a surprising autopsy case he worked on that aided a murder case.

A&E True Crime spoke with forensic podiatrist Dr. Michael Nirenberg to learn about the differences between footprints and fingerprints and why foot evidence can be so valuable to law enforcement.

Forensic science may be on the verge of a straighter path to exposing lies: Through functional magnetic resonance imaging (fMRI), a brain scan that maps cerebral activity by measuring blood flow. Early results of fMRI for lie detection are promising, with accuracy rates higher than 75 percent.

In recent years, hair, blood, saliva, and other bodily fluids from dogs, cats and birds have helped solve several violent crimes in the U.S. and Canada. A&E True Crime profiles four instances where animal evidence helped convict a criminal.

The murders of Libby German, 14, and Abby Williams, 13, shocked the small town of Delphi, Indiana because of their apparent randomness. But what makes this murder case different than most is that it is believed one of the victims may have captured audio and photo clues that point to her killer.

In the wake of Golden State Killer suspect Joseph DeAngelo's arrest, A&E True Crime looks at some of the other high-profile serial killings, where the killer has stopped but currently still remains at large.

A&E True Crime spoke with David Hall, a Florida-based forensic botanist who has worked on hundreds of criminal cases, to discuss the information plant life leave behind. And watch a video on how tree DNA helped solve a murder.

A&E True Crime talks to real bloodstain pattern analysts about how the science works and why some people, including those in the BPA field, are skeptical about how it's used in criminal cases.

Cracking a murder case commonly draws on forensic evidence and eyewitnesses, but occasionally victims themselves—either before they die or after—are playing a role in helping find their suspected killers.