Watch Evil Lives Here: The Killer Speaks

Katie always knew her grandpa, Buster, as a kind man. He had a dark past but was now the center of their big, close family. Then came the murder. He was not the man Katie thought she knew. Now, she finally learns the hard truth about her grandfather.

Raised in foster care, Kristin and her brother only had each other. At first, he was a good brother, but as he grew, he turned into a violent criminal.  After he committed the brutal murders, Kristin still struggles to understand who her brother truly is.

Louis and Tonya are old friends. Over time, they fall for each other and marry, but Louis heads down a dark and violent path, ending in a brutal murder. Now, Louis claims to be a new man. His daughter wants to believe him, but his wife isn’t convinced.

Jenn learns to live with a monster: her big brother, Jimmy. He's cold, cruel, and violent, preying on his own family, mainly his mother, Mary. Eventually, Jenn leaves home, but her mother is trapped in a house with a son she loves — and fears.

Audrey agonizes about why her brother murdered their mother and sister in cold blood.

When Lisa meets Corey, he’s sweet and offers a sense of security. While she’s falling in love, he’s tightening his grip. Lisa barely survives when he brutally attacks her, but the next woman doesn’t. Now, Corey answers Lisa’s questions from inside prison.

Audrey agonizes about why her brother murdered their mother and sister in cold blood.