As I was not ready to let this idea go, I'm gonna explain it more throughoutly.
The current criminal system is:
-Innocent
-Criminal
For killing a criminal you get 2.5k and also you instantly become a innocent(IF you were a criminal).
My idea is adding more layers, like:
-Cop(killed 5 criminals or more in a row, killing him is like killing 5 Innocents)
-Innocent
-Criminal(killed 1 person, get 1k if you kill him)
-Murderer(killed 2 people, get 2.5k if you kill him)
-Psychopath(killed 5 people, get 5k if you kill him)
-Serial Killer(killed 10 people, get 7.5k if you kill him)
-Mass Murderer(killed over 20 people and get 15k if you kill him)
That would however, require some kind of a system where anybody could check the ''status'' of other players. Yet this system would add more fun to the lot as you will have gangs of Mass Murderers, and bounty hunters fighting eachother, while the cops try to bring peace to the city.
I don't know much about scripting or how hard it is, this is just one of my ''little'' ideas.
Thanks for reading!