A mysterious death is under investigation in eastern Iowa.Davenport police are treating a car found in west central Davenport as a crime scene. That’s until an autopsy determines the cause of death of a man found in it. Police received a 9-1-1 call a little before 5 Wednesday afternoon about an unresponsive man in the car in an apartment building’s parking lot. The man’s identity is not known. The car was towed from the scene and is being examined by police and the county medical examiner.