Ok say you want to go kill someone.  The player that you are trying to kill gets a popup that asks whether they want to fight back or not.  If they press fight back, then you fight back.  If you don't, then you shout for police npcs that will immediately come fight the attacker.  This gives the victim a chance to get away and if you are lucky the attacker will be taken to jail.
 Once you are in jail you can pay a bail, you can try try to escape or you can commit suicide.  Also, if you have enough trias, you can pay for a trial and if you win, you may be able to get out. 
 Also if you are being attacked, fighting back instead of calling the police will give exp in a courage skill or something.  The higher rank you have on the courage skill, the more bonus you get when you are attacked.  Also, the higher difference between the power of the attacker and the victim, the more bonus the victim gets.  For example, if you are a high level and you are attacking a low level, the victim would be harder to kill. 
 Just an idea

I know this is probably my computer's problem but I can barely even move around because the game is lagging so much.  Before you flame me: I have a relatively new computer with decent memory.  I don't know if you can fix this or not but if you can that would make the game much better.