What Would You Do?

This Cop is damned lucky he survived this arrest attempt.
I have known for years that most Police are either out-of-shape, undertrained or both. I remember a case where multiple officers cornered a crazy lady holding a cat and a knife in a Safeway market. They penned her in with shopping carts and then shot her anyway. One time, I had to sneak into my sisters house and rescue her while the police had a stand-off with a man armed with a rifle across the street. The police were on the phone with my sister, but ordered her to stay in the house and tell them what she could see. Across the street the man with the rifle had fired shots in the air, and the homeowner, an elderly lady, was stuck inside. The police went to the back of the house and saw the door start to open. They over-reacted and shot. They killed the old lady, who was trying to escape the house. All this happened while I snuck my sister out the back window of her house directly across the street.
I know, stuff happens... and the Police have a tough job. But for goodness sake, give them some better training!
Should this cop have called for back-up before he attempted to arrest the guy? They spent a lot of time in an upper-body clinch, I think I would have tried to chop-kick to the attacker's shins and knees-- especially since the attacker was so large. Obviously the pepper spray didn't work. Perhaps he should have made a better effort to avoid contact and have his weapon pulled and ready to fire. Lastly, the damned semi-auto handgun jammed!
I know there are some cops out there... What should the officer have done?