The older cop helping train a rookie on probation PROBABLY makes his assessment based on several factors. "Would I want him 'going thru a door with me" [ I think that's the right term ] would be on his list.
A rookie who grades well in that assessment might be a tad "too Rambo" to make an ideal cop.
But, if I wuz a cop, I'd probably label him a keeper.
So.......... the Rambos well be with us forever.
