If, the wife of the victim had the presence of mind, to run up to her husband, wrap herself around him, and make loud declarations of her love for him, those civil servants would not have had the audacity to shoot to kill. They would have had to stand down. 
These type of omnipresent tragedies continue to divide our communities and the law enforcement agencies they serve. Ladies, grab your man if in fear of imminent police aggression-  men, lay down on the ground and always show your hands-submission is the best defense, and best guarantee you'll return unharmed to your loved ones. 
You can always get vindicated, if you were truly accosted, in the civil court system.