Christian County Coroner Amy Calvert Winans has released the cause of death for 14 year old Mackenzie R. Morleland.    The autopsy, toxicology, and additional studies by the Center for Disease Control (CDC) along with investigations by Christian County Sheriff Office and Illinois State Police are complete at this time.  Mackenzie died from myocarditis.   The manner of death was determined to be natural.  Mackenzie was pronounced dead on October 29, 2011 at 8:30 A.M. at Taylorville Memorial Hospital.