I don't usually like the Lost Loves segments but there was I found poignant.
It involved a guy in a relationship with an underage girl. The girls mother kept threatening to have him arrested. Then one day the girl showed him a baby and said he was the father but the guy was sure the mother had called the cops so he took off. He never returned.

Anyone remember this case? Thanks!

Yes. The man's name was Paul McDonald. He was interviewed on UM during the 1991-92 season, and the broadcast resulted in a reunion with his daughter.

Thanks you so much!