It's a vicious attack inside a Tempe elevator, and it was all caught on tape. Police are still trying to find the suspect, and some of the people living in the building are just now finding out about the assault.
The assault was caught on surveillance video from an elevator at a townhome near 6th Street and Mill Avenue.
Police said he followed the victim into an elevator and beat him at 2 a.m. on August 11. He punched the victim at least 25 times and delivered several blows after the victim was already lying on the elevator floor.
He then pulled out the victim's earring and cut him with it, leaving it behind. Nothing was taken -- this was not a robbery.
Because of the suspect's stance and the way he was punching, police believe he may be a trained fighter. The victim was knocked unconscious and received facial fractures.
The victim told police he did not recognize his assailant, along with a second man considered a person of interest. Police don't know if his memory was altered as a result of the severe beating.
The elevator where it happened is the only place in the complex where a security guard isn't stationed nearby, according to residents.
Silent Witness is offering up to a $1,000 reward for anyone with information. Police are just now releasing the video because they've ran out of tips and are reaching out to the public.
FOX 10's Jill Monier talked to residents.
Video: Caution, graphic content.