Thanks for the well thought reply.
Obviously I don't know what your skin color is, and I can't presume to know what this particular police officer was thinking when he shot the man in this video. However, he was fired and is currently out on bond for this shooting. Interestingly, he was just arrested again yesterday for shoplifting. The point is that these types of senseless shootings by police are very much reality if you happen to be black or Latino in the U.S. I'm not going to cite a source on that because I think that you should take a look and discover the information for yourself.
Being afraid to go "downtown" after dark is one thing. It's still your prerogative and it's based on personal experience. I've been mugged, so I understand. Being afraid that a cop is going to shoot you and/or arrest you during a routine traffic stop because of your skin color is another thing entirely, and it's the reason people want more cameras pointed at the police.