Amanda and her husband, Alan, claim that 24-year-old Sarah has been using Alan’s photos to catfish other women on social media and say she’s been doing it for years. The couple hired a private investigator to find out who was impersonating Alan after several of Sarah’s victims contacted Amanda.

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Once she was found out, Sarah wrote an apology letter to Alan, but he says, “I didn’t believe a word of it.”

Sarah’s boyfriend, Ken, says that when he confronted Sarah about her activities, she lied to him, repeatedly. When Dr. Phil asks Ken if he thinks Sarah has stopped, he replies, “I don’t know what to believe anymore.”

WATCH How Catfishing Destroys Lives

Alan says he and Amanda once suspected Ken might have been the catfish. What does he say Ken did that changed their minds?

Part one of this two-part Dr. Phil airs Thursday. Check here to find out where you can watch.

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