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.

Three cases of teachers crossing the line with students.

S12/EP1 Nicholas Godejohn discusses his "dark side" in an exclusive interview with "Killer Couples." In 2015, Godejohn and his girlfriend at the time, Gypsy Rose Blanchard, executed the murder of Gypsy Rose's mother, Dee Dee Blanchard. Godejohn was later convicted of first-degree murder and sentenced to life in prison, while Gypsy Rose pleaded guilty to second-degree murder and is currently serving a 10-year sentence.

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.