Just Call 911
Since they have them on video, I'm not sure how this falls under the category of "allegedly". I know it's a legal hedge but give me a break. This is about as concrete proof as you get. The fact that they were fired should tell you something.
Bookmark this page and show it to the next idiot who tells you to "just call 911" when you have a problem like an unconscious 5-month-old or a burglar breaking into your house.