The Special Investigations Unit is investigating the death of a 45 year old Midland man. His body was found in Pete Petterson park just before 6pm Wednesday. The SIU says Midland Police had been in contact with the man by telephone around 5pm regarding an investigation. A distress call was received a few minutes later with led police to the park. Anyone who may have information related to the incident to contact the lead investigator at 1-800-787-8529.