Unfortuneatly Trooper Coates made a list of tactical errors.
Searching a suspect who wasn't handcuffed, searching the suspect from the front (the "kick me" position), he even had both of his own hands in the suspects pockets while standing right in front of him.
This was just the beggining of a string of mistakes.
This is a good example that having a powerfull weapon and good marksmanship are not enough to save your life. Mindset and tactics must come first.
(Note-I referred to the murderer as "suspect" because thats all he was to Mr. Coates at that time)
Mr. Coates murder has certainly saved the lives of many Police Officers and will continue to do so as long as we keep discussing it.