The question likely refers to the fact that Bogart was famously paired with Peter Lorre in several movies, including "The Maltese Falcon," "Casablanca," and "The Treasure of the Sierra Madre." In those films, Lorre's characters often posed a threat to Bogart's character.
So, while Peter Lorre never actually killed Humphrey Bogart, he did play characters who attempted to do so in several films.