Why would a guy even touch the subject? He wasn't riding in the car was he?
This is why cops and many in the security apparatus are viewed as cult members. It is the same with the knee to George Floyds neck. 'Well you know he died from ODing on drugs". Right, it all just came together right at that exact moment. He was probably stoned often but never died.
The guy is telling the cop he can't breath, he is handcuffed and is being kneed on. If you make excuses for this type of behaviour you are deranged as far as I am concerned. Sure you can say there may have been some extraneous circumstances, but when he says "I can't breathe", perhaps he is telling the truth and you should stop kneeling on his neck.
Some of these guys are just psychos and they walk among us. If she shows a stub on her arm, unless you have video evidence to suggest otherwise just move along ffs. Perhaps she was doing something wizardry but if he is only speculating he illustrates his bias.