Craigslist Killer Miranda Barbour didn't become a murderer on her own, sister Ashley Dean told Dr. Phil. Their mother, Elizabeth, made her that way.
"My mom made Miranda the way she is," Ashley cried. "My mom has been a bad mom."
In an interview with Dr. Phil, Ashley accused their mother of being inattentive and neglectful which she says led to Miranda Barbour's current state.
"I just want to make it clear that it's not my sister's fault," Dean said. "She's not this monster on her own. It's come from someone else."
In 2012, Miranda Barbour reached out to Dr. Phil to get help for their mother whom she called a "pill-popping drunk." McGraw says they tried to reach out to her but couldn't make contact.
Ashley Dean confirmed her sister's statements about their mother saying that they were both sexually assaulted when Ashley was 6 and Miranda was 3. While their abuser went to prison for 9 years, that, Ashley believes, is part of the reason Miranda turned out the way she did.
"You have to understand where Miranda's coming from," Ashley explained. "You have to understand what happened to her when she was younger."