After seeing the dog on tv, if your a man and scared of that, time to get your man card revoked. Probably some lazy ass, pathetic cop, looking for an excuse to stop the chase after jumping like three fences into that yard. Dog is like 6 or 7 years old I heard. Looked like it couldnt catch a one legged man in an ass kicking contest!
Overzelous cop probably. Barking dog, adrenaline, first thing he thinks, dog approaching, shoot.
Never been in that position so I cant judge only wish he could have handled better.
In defence of the cop, not everyone is into dogs and some have a deep fear of them. I would forget the suspect and face the dog and back out slow and easy, its his yard not mine. But I have been around dogs all my life (NO NOT MY DATES). Some people have not.