Murphysboro — An investigation is underway concerning the death of an inmate at the Jackson County Jail. According to a release from Jackson County Authorities, a deputy conducting routine cell checks yesterday morning discovered the body of an inmate, identified as Colin Kotlarz of Waverly TN. Kotlarz cellmate was removed from the cell and isolated and the jail was placed on lockdown for safety purposes. The Illinois State Police have launched an investigation and are treating the case as a homicide. An autopsy was scheduled for yesterday afternoon. No further information is available at this time.