The Lt. Columbo Forum

An area where fans from all over can ask each other questions and voice their own ideas and opinions on anything Columbo.

This Forum is fondly dedicated in memory of  "cassavetes45"  (Carleen Zink),
Columbo's greatest fan and a great friend to us all.
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Double Exposure

This might have come up before, but even though Bart Kepple isn't the only COLUMBO character to kill his own blackmail victim instead of getting killed BY his blackmail victim (there's also Paul Gerard and Brimmer), he must be the only to do that, then get a blackmailer himself, then kill THAT person.
In fact, is there any other murder story (in or out of COLUMBO) where that happens?