It'd be kinda cool if instead of seeing what they were armed with weapon wise, or etc if all the body showed was Name: Cause of Death: Time of death:
Then when killed a prop version of their weapon drops on the ground that acts like bullet casings, opening a while now level of RP when the cops come and collect it, possibly giving them the serial number, and then they can use a GSR kit to determine whether it was fired, it also wouldn't be bad to add more things that a hitman can look out for / RP with
"You want So and So Dead?, I'll kill him and bring you his gun as proof."
"I'll kill him and bring you his fingers as proof" etc.
Might open the door to more RP, personally I think when chopping up a corpse you should also get hands, and have the ability to cut off fingers to send a message to people, this is Mafia RP After all