When an unidentified hiker is found deceased in the Florida wilderness, authorities release a sketch. Multiple hikers call in claiming to have met the man. There's only one problem – he never told them his name. It would take two years, thousands of devoted internet sleuths, and a miracle of science to identify him, and that's when the trouble really starts.

Gerald Blanchard's surprising, first-hand account as a calculating and accomplished criminal mastermind. Two unlikely detectives track him worldwide as he commits increasingly elaborate heists in a quest for fame.

A young mother’s mysterious death and her son’s subsequent kidnapping blow open a decades-long mystery about the woman’s true identity, and the murderous federal fugitive at the center of it all.

Examines Gabby's life through the curated lens she created and immerses the viewer in the world of social media sleuthing that was crucial to the case.

Did a remorseful Randy Herman Jr. really commit a brutal murder in his sleep, or was it a convenient cover story? Exclusive access to Herman and his family, the defense and prosecution attorneys, journalists who covered the case, forensic psychiatrists and world experts in violent parasomnia (sleep-walking) give an inside look at the shocking twists and turns of the controversial crime.

Serial killer Dennis Nilsen narrates his life and horrific crimes via a series of chilling audiotapes recorded from his jail cell.