How about a new columbo movie entitled "Columbo in Vegas?" He can investigate the murder of some big wheel...ah, high roller that is. Can you imagine Columbo shooting dice though? "Come on 7................"
This wasn't in Vegas, but i always wondered why Columbo didn't go to the club where Mark Halperin was gambling and Hugh Caldwell was drinking the night of the murder. A whole bunch of people saw Hugh come in visibly upset and call Mark away from the table to talk to him. Plus, as people have written here, Hugh called Margaret that night, too, looking for Mark.