TROY, Ala. — An Alabama prosecutor says police body cameras recorded the arrest of a teenager whose family says he was severely beaten by officers.

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, who is black, 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.

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.