An Augusta man accused of killing and dismembering his roommate pleaded not-guilty Friday to murder charges. Altaye L. Knight, 21, was arraigned in Richmond County Superior Court on charges of felony and malice murder in the May 21 death of 27-year-old Damon Terrell Prymus. Prymus’ remains were found in a Hephzibah field at Williams Drive and Wilson Road.