That's right; it was someone who had written a Columbo screenplay (I guess it would be) and entitled it "Murder by Suicide", and when a few years later the screenplay was purchased, the actual episode was called "Columbo Likes the Nightlife".
Sorry, guys, you're mistaken. "Murder By Suicide", written by Frank D'Angeli, was purchased but has not been produced. I don't want to give away the plot, but it has no relation to "Columbo Likes The Nightlife", and is a completely different story.