I'd say it would be "TAKEDOWN AUTHORIZED" above the perpetrator's head when they meet these requirements:
- have 6 stars;
- have fired a firearm in a certain radius (I'd say 50 meters*) and if a cop is a witness of such action;
- even though they aren't carrying a firearm, the action of shooting a firearm while a cop is a witness, it shows what I suggested above.
When such perpetrator has 5 stars or less they continue not being a deadly threat, just like it is stipulated right now in MCNR Cop Rules.
This above I suggest it for cops, for criminals it remains the same: "MOST WANTED" and for the rest of the civilians and other working class.
*50 meters or 75, 100... flexible for debate.