Those doubting the authenticity of the event could have done a little cursory searching. They would have seen the police report filed by the uploader, the tweet by the lawyer's employer (Clinesmith Law Firm) denouncing his actions, the removal of the lawyer's photo and info from said law firm's website, and the removal of his LinkedIn photo. If you think all that would happen in a fabricated encounter, by all means produce evidence demonstrating that claim.