Man injured by violent arrest at Dec 5 civil rights protest in Chinatown

On Dec 5, civil rights protesters in DC shut down Chinatown on multiple occasions. At about 10:55PM cops suddenly pursued someone said to be one of the protesters, the crowd surged after them. When the scene opened up a bit one man was down and in handcuffs. He suffered seizures police said were caused by being pepper sprayed. They left him in handcuffs through the seizures, and no ambulance was summoned. Finally a bunch of cops picked him up like a log and carried him off to an unknown destination at or beyond the end of the block

I saw but was unable to film the crowd charging after the cops as this incident began, but when the scrum cleared I was able to see and film what the cops had done: injured a man sufficiently to trigger seizures. Cops claimed the seizures were caused by pepper spray, but I have never seen pepper spray do this before and have seen it used both by police and by others many times. Even when police fired 17% super strength pepper spray directly into crowds in IMF and Inauguration protests I did not see anything like this. That stuff caused permanent lung injuries in some protesters ten years ago, yet I never saw it cause a seizure. Yet cops did something to this man that left him with a serious medical issue, I do not know exactly what it is as the initial incident took place out of my view in this huge crowd.

On top of all else, as police pushed the crowd back from this incident a woman was injured by someone in a car, apparently by accident. There is a Twitter report of a woman struck by an opening car door, falling down and hitting her head, I do not know if this is the same or yet another incident. Whatever happened protesters reported it was an accident with no malicious intent, implying the chaotic results of police pushing back the crowd may have contributed to this second incident. There was a youtube video saying a woman was struck by a car at https://www.youtube.com/watch?v=UtF6O_PgKbo but Youtube took it down for unknown reasons

Video showing results of police assault on man said to be a protester