.  People can go on and on about what the cops are supposed to do, what their training tells them to do, and, sure there are some rare individuals, who because of their nature are hero material, in the military they win medals like the VC or Medal Of Honor, but human nature overrules standard training when it comes to situations in which we perceive the risk to our lives is very high, to play Russian Roulette we need a very good reason.  