Re: Please help me ! I've been looking for the name of this episode for years !
Sorry, Philidor, that's not a "Columbo" episode. Maybe someone will recognize it as the plot from another cop or detective show. There was an episode with a complex arrangement to fake the time of the shooting, which did involve a dropping marker-pen (and a record player, and a heavy dictionary, and a splib, and an umbrells), although it didn't really work the way you describe -- that one was "The Bye Bye Sky High IQ Murder Case".
Re: Please help me ! I've been looking for the name of this episode for years !
Thank you very much guys, you're genius and amazing fan of the Lieutenant Columbo. Even with my approximative description of the episode, you manage to find the right one ! I'm about to watch the BBSHIQMC right one !