The Thin Man is one of my personal favorites. If you like it, there are several sequels that are generally worth watching, but they tend to drop off in quality with each installment.
While I'm suggesting old black and white movies, I should also mention The Big Sleep and The Maltese Falcon. I'm not sure if detective noir quite counts as murder mystery, but I figured I should suggest them anyway.
The Thin Man is one of my personal favorites. If you like it, there are several sequels that are generally worth watching, but they tend to drop off in quality with each installment.
While I'm suggesting old black and white movies, I should also mention The Big Sleep and The Maltese Falcon. I'm not sure if detective noir quite counts as murder mystery, but I figured I should suggest them anyway.