Three cases of teachers crossing the line with students.

S3/EP1 While interviewing Chris Watts, investigators receive a tip that his wife, Shanann Watts, and their two daughters, Bella and Celeste, were possibly sighted on Walmart security footage. They showed Chris a still from the footage, but it ended up being a different family.

S3/EP1 In this exclusive sneak peek of the upcoming Chris Watts episode of "Criminal Confessions," hear from Denver Post Reporter Elise Schmelzer and forensic science laboratory manager David Maloney on what they think about Chris Watts’ motive to kill his entire family.

S3/EP1 Investigators speak for the first time on one of the most baffling cases they’ve encountered, exposing the devastating truth about what happened to Shanann Watts and her two daughters at the hands of seemingly devoted husband and father, Chris Watts.

S3/EP1 Exclusively for Detective’s Den members, take a look at the first 7 minutes of the Chris Watts “Criminal Confessions” episode now before it airs on Oxygen December 7 at 6pm ET/PT.

S3/EP2 After getting a call that a wife and mother had been missing for 10 years, sheriffs launch an investigation that uncovers a threesome relationship, an eerie deathbed confession, and a web of lies spanning a decade that leads them to the truth.

These 4 teachers were caught having scandalous relations with their students outside of the classroom.

S1/EP1 Watch surveillance footage of serial killer Israel Keyes abducting a woman from a coffee stand.