The 3 others cops were aiders and abettors in the commission of a crime and they should have been arrested too.
How much weight does a CITIZEN'S arrest have and what better place to use it than when watching a cop murder anyone?
While the guy was DYING arrest the SOB. A murder could have been prevented. ONCE DEAD arrest the cop for murder which everyone there WITNESSED. I don't get it.
Of what use is a citizen's arrest if it is not used to save a life? Jaywalking? Seriously?.