Three cases of teachers crossing the line with students.

S1/EP99: Zack Jarrard talks to Payne Lindsey about Ryan Duke's and Bo Dukes' alleged involvement with Tara Grinstead's disappearance.

A companion to Bravo’s scripted anthology, "Dirty John, The Dirty Truth" goes beyond the articles and podcasts made famous by Los Angeles Times reporter Christopher Goffard, and traces con-man John Meehan’s trail of manipulation that started long before he met Debra Newell.

Check out this sneak peek of Bravo's Dirty John, premiering November 25 at 10/9c.