Originally Posted by tsmo1066
My point is that the officer didn't have to instantly demand that the father surrender his weapon. The man wasn't breaking any laws or committing any overt, illegal act. Given this, the officer could have (and likely should have) simply asked that the father re-sling his weapon in a less 'aggressively tactical' manner.
Good cops know that sometimes the soft approach and defusing a situation works better than pushing a hard line and escalating things.
The mannerisms and totality of the circumstances of the contact dictate how it's played. The guy with the rifle at ready/pistol in his hand who is doing nothing obviously illegal may have just killed his wife down the street.
If you are investigating an unknown situation with a weapon at the ready you disarm them, not doing so has got plenty of cops killed. For example, a holstered pistol may be treated different than one in the hand.