CHARLESTON COUNTY, S.C. (WCBD) — A police report says a black inmate ran from his cell and down stairs to attack the white man charged with killing nine people at a historically black church in Charleston.

Dylann Roof, 22, is in jail awaiting trial for the deadly shooting during a bible study at Emanuel AME Church on June 17, 2015.

According to the incident report, another inmate started hitting Roof in the face and body while he was in the shower. Officials say the incident was unprovoked and was broken up by a detention officer.

WOOD TV8’s sister station WCBD has identified the suspect suspect as Dwayne Marion Stafford, 26, of Goose Creek. Stafford was jailed in January for a strong armed robbery and first-degree assault and battery. He is now facing a charge of third-degree assault and battery for the jail beating.

Roof has bruising on his face and back from the incident.

Roof faces dozens of charges, including hate crimes. If convicted, he faces the death penalty.

Roof’s federal trial is scheduled to begin November 7. Jury selection in his state case is slated to begin in January.

The original version of this story was first posted on WCBD’s website.