the sad thing is... IF the cops lie about what happened, they won't be punished for that lie.
cops aren't prosecuted enough for telling lies, which video later disproves. Their only fear is "I may have been caught on video". The rest of us would worry about "I may go to jail for lying" thing. They get caught saying something completely false, and it's just "oh, okay, let's rewrite this..."
Local guy was going to prison for grabbing a cop's gun when the cops raided his home. His own in-house video showed him on the ground getting kicked, not going for any gun. He was looking at a decade in prison for "going for my gun" and it never happened. They just quietly dropped the case. That cop should have been in prison for the ten years.