Uh, I think he’s dead. The OP asked about PI’s still working today, which is what I was talking about.
Hey! I just found another one. He may or may not still be working though:
Wayne Knight yes, NEWMAN from Seinfeld, was/is a private detective.
William Dear got a lot of publicity based on the “Dungeons and Dragons case” (the disappearance of James Dallas Egbert). I think that is how most private investigators get a reputation these days – they are called in by frantic parents in kidnapping and disappearance-type situations, and milk the publicity for all it’s worth. Book deals, television appearances, the works.