Wow, I remember reading about this case but I never knew Stacy's mom had also gone missing. I wonder if Drew was involved, or if not perhaps he was inspired by it. After all, if her mom was never found and no one was ever charged because people believed she left willingly, that might have made Drew think he could get away with making Stacy "disappear" the same way.

I did some googling and found this article, which says Stacy and her sisters believed their mother had been murdered but couldn't get the police to take it seriously. Stacy's mother had a history of mental illness and disappearing for short periods of time, which Stacy didn't, but I'm sure Drew thought he could convince people Stacy was the same way. Thus he decides against staging another "accident" and instead claims she left on her own.