I think it would be good if the bodies could have a description on it if the person was killed due to violence.
It could simply say "dead body, with marks of violence" or something of the likes.
In that way murders and conspiracies would be easier to solve, and in a more realistic way. Someone who has been locked up with another person and killed them with a sabre shouldn't be able to get away by saying that the other guy had a heart attack

In the long run it would be cool if poisons were implemented, so that you could kill people and make it look like they passed away from natural causes.