Is anyone even implying that the deaf man ran toward the police officer while signing?
Apparently from other comments, there's a lot of information that's been left out in this article. But I've been alive long enough and on FR long enough to see what has been happening with police seemingly using deadly force too freely against people and their pets.
Granted, there are elements that hate police and target them, but when one is enforcing the law and has the powers that are thereby granted, it should be axiomatic that such an individual be held to a high standard. Especially when a life is taken.
If you don't want to be shot by a cop, don't run from cops and don't jump out of your car waving your arms. It's not rocket science.
And the cop had absolutely no way of knowing the guy was deaf. If you have evidence that he did, present it or shut up.