I also like the way the killers in "Columbo Goes to College" apparently failed to realize how smart Columbo was, right till the end... just a couple of self-centered kids.

Columbo does express dislike for a few murderers -- A Stitch in Crime and Murder Under Glass come to mind, although I think Alex Brady of Murder, Smoke and Shadows may be the one he hated the most. Our hero certainly gloated more openly over trapping Alex than any other killer.

Russell Martin
He did show a slight dislike for alex brady, and rightly so.He was quite a dislikeable murderer. Quite a snivelling little brat,I wonder who was the charactor based on.