On the evening of September 16, 1993, officers in Denver responded to a report of shots fired near the 1200 block of Washington and Clarkson Streets and found 53-year-old Dennis Sullivan suffering from gunshot wounds. First responders pronounced him dead at the scene. His vehicle was also reported stolen during the incident.

The Denver Police Department classified the death as a homicide and opened an investigation. Despite that immediate response, the case went cold; no suspects have been publicly identified and no arrests were made. The case remains open with the department.

Did anyone in the area that night see a vehicle leaving the scene or notice anyone acting suspiciously around Washington and Clarkson Streets?