Inside The Mind of a Serial Killer

After serving a sentence for killing his wife, Theodore Johnson is released from prison -- only to keep on killing.

While working as a nurse for the elderly, Elizabeth Wettlaufer makes it her mission to kill the very people she's supposed to care for.

A young man enters a police station, complaining of harassment from a neighboring town's police force. Later, that same man would confess to murder.

Successful real estate agent Todd Kohlhepp hides a deeply disturbing life -- one in which he kidnaps, enslaves and kills.

In 1990, a man named Douglas Perry kills three women. By the time authorities track Perry down, more than two decades later, Douglas has become Donna.

Sheila Labarre invites men to her New Hampshire farm, where she abuses and murders them, leaving behind grieving families.

After the deaths of murderers Ian Brady and Myra Hindley, news breaks that a briefcase left with Brady's lawyer may contain clues to his motives.

For 30 years, Ireland's Kieran Kelly targets homeless people and transients, sometimes even pushing them into oncoming trains.

Watch Anthony Shore. Episode 1 of Season 2. 1. Anthony Shore 44m In 1986, Anthony Shore, a married father of two, abducts and murders a 14-year-old girl. It would be the first in a string of brutal killings.