Hundreds, and possibly thousands, of Native American women in Alaska, and other parts of the U.S. are turning up missing or murdered.

A&E spoke with sociology and criminology professor Jack Levin, who explained how serial killers remember their victims.

Gypsy Rose Blanchard and a former boyfriend are in prison for the murder of Gypsy's mom, Dee Dee Blanchard, who was believed to have an attention-seeking psychological condition, Munchausen syndrome by proxy. We speak with Gypsy Rose's father, Rod Blanchard.

The circumstances around the cult leader's death is still a mystery decades later. Was his gunshot self-inflicted? Or did someone kill him?

On September 29, 1982, and in the few days that followed, seven people in the Chicago area died in Tylenol-related poisonings. The capsules were all laced with cyanide. The killer or killers have never been found.