Published: Aug 17, 2010 11:31 PM EDT
Updated: Aug 17, 2010 5:45 PM EDT

DENVER, Colo. - The mayor of Denver is asking the FBI to investigate a videotaped incident where a police officer beats up a man.

The two police officers involved have already been disciplined; one was suspended for three days and the other had his pay docked for the day. However, they were not disciplined for the supposed brutality, but filing false reports.

The mayor is not done with these officers yet. Mayor John Hickenlooper said that an FBI review of the full case would "help ensure justice is appropriately served."

"The video is very disturbing, and when viewed in isolation, it does not reflect well on the officers involved," Hickenlooper's statement said. "But the video tells only a portion of the story."

"It was clear to me they were trying to cover up what actually happened and make it look better than it was," said Richard Rosenthal, who reviews police internal investigations.

Michael DeHerrera is the man in the video on the phone, who gets punched and brought down to the ground. He was supposedly on the phone with his father who is a deputy.

"I think they should be fired, and if not, prosecuted for assault," DeHerrera said. "I think if any one of us had done these actions and assaulted someone, we would all be in jail."