Um, WHAT?
Do you think the police should be allowed to go around shocking every jaywalker and loiterer, too?
Either you are confused or you read a different story...
He was stopped for walking his unleashed dogs. No big deal.
But when asked for an ID he then provided a false name. This is no longer in the category of a civil offense.
Then, when when given a lawful order to remain at the site, he attempted to leave. Not smart.