Okay, look at the video,...
Pause it at 5:20. you can clearly see that there is a light shining on his hand with the gun, the rest of his arm fades into darkness, is it really that hard to believe that he could see the gun and not see details of the badge the cops where wearing because of the torch being held in his other hand?
Quick question, this guy had no history of criminal activity, was a father, if you insist he knew they where cops, why attack them knowing what US cops generally do to people when threatened?