You missed the whole point - the car did not need an updated sticker - it was a dealer car - (try reading the article) - so there was NO LEGITIMATE reason to stop him in the first place -
in the second place, after the man told him what he should already have known - and pointed to the dealer plate - the wet behind the ears 23 year old rookie, with his rap music cranked, escalated instead of backed off.
Fortunate for all concerned, the elderly man didn’t break a hip when falling - nor have a heart attract due to the tasing - This little punk with a ‘shield and a gun - and a taser’ needs to have his jackboots taken away.
If by that you mean he should be fired and banned from jobs in law enforcement, I agree.
A couple days ago the Roberts Court upheld a stop and search based on an incorrect reading of the law.