Not to nitpick but have you ever heard of a no-knock warrant ... it is all the rage with SWAT units of late. Not that this incident would give rise to such a warrant, just say’n.
As for this clown, he should, at the very least, be arrested for B&E and should thank his lucky starts the occupant didn’t have a gun at hand. ;-)
No knock warrants are unconstitutional.
They may be fashionable with SWAT teams, but SWAT teams of late have been ignoring the Constitution when it doesn’t serve the interests of The State.