Unsolved mysteries occurred in your life?

For me, there is this guy who made a Facebook account acting as my mother, he used it to talk to my friend and my aunt and make up stories about us. And literally, my friend and my aunt came to us with stories that never happened to us like we traveled to a city, mind you at that time we hadn't traveled for five years, at first my friend thought he was stalking her or something, but the guy was talking to my aunt too. Anyway, I'm sure the guy was my age and was around me because he knew who my friend was, how he got my aunt's Facebook account is easy I'm sure facebook suggested that account because of the last name, but I swear to god till this day I don't know who this guy was.