The Devil You Know - Season 3 (2012)

A son discovers that his mother is a con artist of epic proportions, and will stop at nothing to get what she wants. While Kent Walker avoids her evil influence, he fails to protect his younger brother from becoming her lackey in crime--and a deadly killer.

After a bitter divorce, a flight attendant becomes the target of an assassin. Heather Grossman doesn't know what's coming to her.

John Wayne Gacy's sister, Karen Kuzma, discovers her beloved big brother's dark secret. She realizes he is the serial killer that has been stalking teenage boys.

Two sisters believe that their dad is an All-American hero and highly respected arson investigator. Their dreams are crushed when they discover that he is in fact one of the worst serial arsonists of all times.

12-year-old Kim Wohlert helps her mother in committing a crime in 1980. She watches as she shoots her father, and she keeps her terrible secret for 20 years before deciding to bring her mother to justice.