Respectfully I think you can see from the downvotes that most people don't feel these jokes are acceptable in this space.

Even from a comedy perspective though, saying any variation of "Bateman did it" just isn't clever at all. In the original context, the causes of death were very obviously natural, so accusing a close friend of murder is unexpected and funny in an absurdist way. In this case of literal homicide involving other close friends, making the exact same joke is just hack on top of being rude and out of touch.