This is bullshit.
In this case we're talking a 12 year old, the brother murdered in SC who ran and was shot in the back, Eric Garner, etc. none of these or the many others would be what I'd classify as exigent circumstances.
Outlaw, I feel your passion and anger but allow me to clarify a few things.
However, you have to know the meaning of of exigent circumstances before lashing out.
I said 'some' not all. The case in S.C. is 100% inexcusable. There is simply no rational or legal defense for the officer's actions. There were no circumstances that justified the shooting.
Garner, for whatever his own reasons, decided it was his prerogative to resist detainment and then arrest.
Tamir, regrettably had been brandishing and drawing down on people with a replica firearm that could actually shoot projectiles. I remember seeing a picture of the gun he had in an evidence photo and it was so realistic a looking .45, I would say that it would take an experienced eye to tell at a distance that it wasn't a pellet gun. Weapon recognition at that level of detail is something no police force trains their field officers to identify. For added effect, the chance that this mis-ident can happen is also why in many states pellet gun and airsoft replicas are semi-regulated and age restricted.
To expect an officer to make a split second to determination whether the gun is real or fake, after being called in on a firearm's call, when the person is raising one side their jacket in way that resembles someone preparing to draw a firearm INSTEAD of putting their hands in the air or laying on the ground is beyond unrealistic. Would you wait? Should you wait for someone to get a bead on you?
A child being shot is one of the most tragic things I can think of. This is not an endorsement of the officer or his actions either but rather a statement that as a rational human, I can see why the officer thought this "suspect" was preparing to draw their weapon