The 35-year-old suffers from osteogenesis imperfecta, a genetic condition that makes his bones fragile and more likely to break.
Shocking video shot in Portland captured the moment a disabled protester was violently arrested by riot police.
Dustin Brandon, 35, who uses a wheelchair, had is arms wrenched around behind his back and was dragged around the pavement before being zip-tied, after he apparently refused to move from outside a convenience store.
The confrontation was recorded by fellow protesters; the clip shows the officer dressed in heavy riot gear, ordering Brandon to go home.
"They tried to break my arm – my right arm – when the first arrested me, while putting two pairs of cuffs on me, behind me. They ended up tearing my rotator cuff," he told The Independent.
"Honestly, as a guy in a wheelchair, my f--king arms are everything. If I'm marching every day, if I'm protesting every day. What would you do – punch me in the mouth or break my arm? I know what I'd do if I was a police officer."
Another video shows a police officer accuse Brandon of hitting him with his wheelchair; he was later charged with "interfering with a peace officer."