LEXINGTON, Tenn. (AP) — Police have charged two more men in connection with the 2011 disappearance and slaying of a Tennessee nursing student.

Tennessee Bureau of Investigation spokesman Josh DeVine told media outlets that two brothers, Jeffrey Kurt Pearcy and Mark Pearcy, face charges of tampering with evidence and accessory after the fact in the Holly Bobo case.

DeVine declined to release more details, but an affidavit in Henderson County court says investigators believe Jeffrey Pearcy has possession or knowledge about a video that would benefit prosecutors.

Two other men, Zachary Adams and Jason Autry, have pleaded not guilty to kidnapping and murder charges.

An attorney for Jeffrey Percy said the charges against his client are untrue. It wasn't immediately clear whether Mark Percy has an attorney.