Season 6

For 17 years, Kathy Swanson fears her son, Michael, will harm someone; she tries in vain to convince people that there is something different about Michael, then her worst nightmare comes true.

William Knorr's mother, Theresa, always threatened that if she ever went to jail for what she had done, she would take him down with her; after years spent helping her keep the horrors secret, he may go to jail with her.

As a child, Pam Jacobs spent years of her life on the run from the law. But she had no idea that her father, Charles Sinclair, was a wanted man until the day the FBI caught up with them.

When James Henslee realizes he is the police's prime suspect, he can't believe it but he attempts to convince them that someone he had once looked up to was the one capable of murder.

Ronald and Patty had always seen the signs that their older brother, Bernard Eugene Giles, had a darker side, but when Gene finally let loose the monster lurking inside, they couldn't help but wonder how things had gone so wrong.

When Clare Bradburn's ex-husband, Ed, suddenly confesses to his crime after 26 years, she thinks she finally has justice, and that the nightmare she lived for decades would end; she never expects that her nightmare would continue.

When Tim Kreider discovers proof that his son, Alec, was responsible for a horrific crime, he knows what the right thing to do is; his instincts as a father tell him something else.

When Elizabeth Flores was a child, her sister, Louise, tried to shield her from a horrible family secret. But when Louise met David Turpin, that all changed. How did Louise go from running from monsters to becoming one herself?