District Attorney Tom Anderson did not tell The Troy Messenger what the video and audio shows. He is waiting for the State Bureau of Investigation to finish its probe before commenting further.
The mother of 17-year-old Ulysses Wilkerson, Angela Williams, posted an image of her son's swollen face on Facebook. The family says Wilkerson was startled by police in Troy on Dec. 23 and ran from officers who caught up with him and beat him while he was handcuffed.
"I just want to know. I don't know till this day, I don't know what happened," Williams told CNN. "Police told me nothing. I hear what they telling the reporters but they hadn't told me nothing."
Police Chief Randall Barr has said the teen struggled with officers and reached toward his waistband as if he was trying to grab a weapon.
"We will not settle until we know the truth behind the brutal beating of my dear son and until these police officers are held accountable for their crimes," Williams added.
RELATED: Teen claims he was beaten by police during arrest
The Associated Press contributed to this report.
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