Summary: Police responded to a report of an open door and alarm going off at a duplex located at 4125 North Ashland in Cook County, Chicago, Illinois. The caller reported the door was wide open, the alarm was sounding, lights were off, and no one appeared to be inside. Officers arrived on scene, confirmed the open door, and requested additional units. After further investigation and contact with the caller, the situation was determined to be non-threatening, and additional responding units were disregarded.