Tl;dr: 75-yo old woman attacks the employees over a sandwich, rips hair from one of them, put that hair in her purse, calls the police and dies.
At that point, two other employees intervened, and as they were pulled apart, a “chunk of hair” was pulled from the shift lead’s head, “leaving a raw area.”
Once separated, the employees got behind the counter and Grayson sat down, taking a phone call. She was seen picking up the shift lead’s hair and putting it in her bag, police said.
I don’t doubt someone probably made that claim and popularized it for their own reasons, but anytime someone makes a similar claim about mental health and assault I am always dubious.
People having a mental health crisis are overwhelmingly more likely to be the victims of violence than perpetrating it.