That is the story Wilson gave, not the conclusive story that actually happened. And besides, just because someone is big, that excuses shooting them multiple times? I see this multiple times people trying to say "Brown was big etc.". That shouldn't factor into how someone (a cop) handles a situation.
People even tried to justify Eric Garner by saying they had to choke him because he was big, like that makes any sense.
You have no clue what actually happened...the only thing you can go on is what people "said".
And size ABSOLUTELY factors into the way use of force is executed. A female officer of 125lbs who is confronted by a suspect who is 300lbs will have to use different types of force to stop an incident vs. another officer who more closely matches the threat's physique. This is law enforcement 101 my friend...nothing surprising or secret about it...if you have a big individual and you're not big, you can't just attempt to physically restrain that person in the same way an officer could if they were closer in size. This is why officers are given several different tools to restrain an individual...everything from plastic zip ties to the fire arm.
Eric Garner was asked several times to place his hands behind his back, and he refused...he was given several opportunities to comply with the arresting officers, and he still refused. When the officers attempted to physically detain him, he resisted and fought against them. This lead to his death...not by the arm bar placed on him by one of the officers (which, depending on application, is frowned upon by not the illegal "choke hold" people want to assign to what they saw).
Eric Garner died of asphyxiation because of pre-existing health issues and the physical stress his body endured while the officers were restraining him...the officers did not kill him with the restraints they exerted on him...and this is why no charges were brought against the officers, because it was considered justifiable homicide under the regulations set forth for officers in the line of duty.
The only piece of the situation that I felt warranted further investigation (and I believe actually IS receiving extra investigation) is the fact that no one administered CPR to Garner after he was restrained. They explained that they felt because they THOUGHT he was breathing, that CPR was not appropriate. The problem I have there is that there was an EMS unit there as well as officers who are at the very least trained in basic first aid and CPR, and it is not very hard to verify if someone is in fact breathing...or at least breathing enough to maintain heart and brain function.