The fact is that he was technically unarmed when he was shot/apprehended. They found a gun in his vehicle, which he was legally allowed to carry in Ohio. If you want to have a discussion around whether he fired a shot out of his window in the direction of police, that's a separate matter.
If I fire a shot out of my house, drop the gun, flee out the backdoor, and am subsequently shot running through the neighborhood, I was not armed at the time of being shot/apprehended.
Akron Police Chief, Steve Mylett, even confirmed on Sunday that Walker was unarmed when eight officers shot at him. So maybe your quibble with the unrest should be with the the Chief. ?