(KMOV) – The two men identified as suspects in the death of 22-year-old Zachary Irvin of St. Elmo, Illinois, have pleaded not guilty at their arraignment. The two suspects are Dennis Iagulli, 41, and James Pierson, 35. Irvin’s body was found dismembered and burned in East St. Louis in June. His body had been so badly disfigured that his identity was only able to be confirmed though dental records.A judge will now be assigned to the case. A new court date has yet to be set.