Fearing there might be a predator on the loose, residents from Metamora, Ohio, rally to find 20-year-old Sierah Joughin, a beloved college student who disappeared while riding her bike home on July 19, 2016. Hundreds of volunteers form search parties to locate the missing woman, but there is still no sign of Sierah.

S12/EP1 Bobby Godejohn says he believes Gypsy Rose used his son, Nick, the way she learned to manipulate people from her mother, Dee Dee. He is overcome with emotion, reading a birthday card Nick sent him from prison

Three cases of teachers crossing the line with students.

S2/EP9 In 1984, John Heath reports that his soon-to-be estranged wife, 32-year-old Elizabeth Heath, has gone missing. Investigators become suspicious of John after learning he had financial concerns surrounding their impending divorce. Did John snap and end up killing his wife after learning he would have to pay alimony? The search for Elizabeth uncovers unsettling information about the couple.