Completely random observation
SWAT 4 for the PC is a fun game, and what is interesting is the way to get the best score is to take in the criminals and/or terrorists unharmed. You do not get as many points for killing a bad guy as you do for arresting them. But if I die a lot I tend to start racking up "unauthorized use of deadly force" penalties as I become less likely to wait for bad guys to surrender, shooting first and asking questions later.