I found this 1975 comedy while rooting through the clearance DVDs today. I Wonder Who's Killing Her Now has a screenplay written by Mickey Rose, he wrote the story with Jerry Cutler, and Steven Hilliard Stern is the director. The title was familiar to me but I don't remember seeing it. It's a pretty easy to forget movie so who knows.
Bob Dishy is a complete idiot who lucked out and married a rich woman, played by Joanna Barnes. He works for her father and he embezzles from the compnay. He's caught and his wife wants a divorce. He hires a hitman who jobs the killing out to another hitman, that guy does the same and so on until we're about 5 or 6 layers deep in murderers. Each one is bit more incompetant than the previous, the last one is an out of work actor who takes the job for $6.95.
Bob expects to get paid from an insurance policy but that all falls apart and he has to stop the hit man. One after the other, he tracks them down, and there are all sorts of odd characters played by people like Bill Dana, Harvey Jason, Severn Darden, Vito Scotti, Richard Libertini, Steve Franken, Jack DeLeon, Ian Wolfe, Marvin Miller and Pat Morita.
As a comedy it's not so good. There are a lot of weak jokes and some out and out dumb ones. It's mostly good natured, even if it involves attempted murder, and hardly anyone gets hurt. It even has a happy ending of a sort. Not sad to have seen it but there are plenty of better comedies out there. I have it, I'll keep it, but it's not hard to think I'll never see it again.