The closest that I can think of is "Columbo Cries Wolf", in that episode he keeps accusing someone (Sean) of murder when he hasn't really committed one (yet). A

The closest that I can think of is "Columbo Cries Wolf", in that episode he keeps accusing someone (Sean) of murder when he hasn't really committed one (yet). Another huge columbo fan here :-). Edit: Another one I can think of is "Murder in Malibu", it is really hard to tell who is the murderer in this one. And even Columbo seems unsure for a while.