Right after "be careful what you wish for" in the idiom dictionary is a picture of 41-year-old Matthew Roberts. 12 years ago, Roberts began to search for the identity of his biological parents. He eventually found his birth mother and was shocked to learn that his father was none other than Charles Manson. Roberts said, "I didn't want to believe it. I was frightened and angry. It's like finding out that Adolf Hitler is your father. I'm a peaceful person — trapped in the face of a monster."