WATCH: Florida cops' beating of mentally ill man was so bad that bystanders tried to intervene

Two Hallandale Beach, Florida cops have been suspended after footage emerged that shows them beating an unarmed man.

"The first guy started with the handcuffs, hitting him in the back of the head," a witness told WPLG. "When he started screaming, they got the cuffs on him. But as he got the cuffs on, the other guy is taking him and shooting him with the Taser, punching him around the car."

The beating got so bad that bystanders tried to intervene.

"Everybody started screaming, 'Hey! Hey! Hey! What is going on? You don't have to do that," another witness recalled. "He is already restrained.' And the guy is not forcing back, not fighting back or nothing."

The victim was identified as Daniel James Dunkelberger, who is thought to suffer from mental illness.