There is video. The victim is a frail old woman who had only a few months prior to the attack undergone a liver transplant. The attacker is a robust-looking, much-younger woman who most definitely initiated the physical confrontation.
They were both wrong. Still not Staples’s fault.
The older woman exercised extremely poor judgment, she initiated the conflict.
From the old National Lampoon Hour: two wrongs don't make a right, but 3 do.