Way to early to rush to judgment. Did she yell her boyfriend had a gun and then did the man refuse the order to "not reach for it?"
This may be another indefensible shooting, but perhaps not: it's too early to tell.
Here's what we know: the policeman approached a car at 9:00 at night; the driver and passengers were black. 
There is some confusion over when and how the police were advised the man was armed. Also, when- or whether- the policeman ordered the man to freeze.
Before condemning all cops, let's look at facts that play into these situations: a. Black areas are much more violent than any other; b. Black men have an extremely high murder rate. Ask yourself if, knowing this, you as an officer would not be extremely nervous/on edge upon approaching and interacting with a black person in a darkened vehicle at night. And no, there is no "training" that prepares an officer to let himself be shot before he shoots.
This is NOT condoning the shooting. It is putting this in some context.