Derrick Todd Lee terrorized Louisiana from 1992 to 2003, eluding capture for years. Eventually, advanced DNA testing would help police close the net.

In 2007, Gary Hilton's abnormal and detached life goes into a downward spiral that would culminate in him taking the lives of four innocent people.

Richard Beasley used Craigslist to lure desperate job seekers to the woods with promises of employment at his fictional ranch. He claimed three lives and maimed a fourth men before capture.

Using the I-45 Interstate as an escape route and hunting ground, William Reece was committing assaults and murders for over a decade. It took brave victims and their families to bring him to justice.

Jason Scott was a master of disguise, but he held many secrets: at night, he was a serial home invader and a killer linked to five cold-blooded murders - including two brutal mother-daughter murders.

Matthew Hoffman was a seemingly ordinary tree trimmer in the sleepy town of Mount Vernon, Ohio. However, he concealed an obsession with a family and a brutally violent side.

Stewart Weldon was a career criminal operating in plain sight with convictions for kidnapping, burglary and sexual assault. It would take a routine traffic stop for the darkest depths of his crimes to be revealed.

The installation of a CCTV system in a Tyler, Texas hospital caught a twisted killer who was using his position as a health care worker to secretly kill patients.

Highway 16 in British Columbia has been dubbed "The Highway of Tears" due to the amount of reported missing peoples. Growing up near this notorious road was young disturbed individual, named Cody Legebokoff.

Howell Donaldson graduated with hopes of a basketball career. When his dreams didn't become reality, his narcissistic downward spiral ended in the shootings of four innocent people to death.