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North Powhatan Street, Arlington, VA

Married Couple Dead Of CO Poisoning In Arlington Ruled Murder-Suicide: Police Married Couple Dead Of CO Poisoning In Arlington Ruled Murder-Suicide: Police
Married Couple Dead Of CO Poisoning In Arlington Ruled Murder-Suicide: Police A married couple in Arlington died of carbon monoxide poisoning in what authorities have ruled a murder-suicide in Arlington. The deaths of Arlington residents Maria Theista MacKnight and Gregory Cunningham, both 72, were ruled a murder-suicide months after their bodies were found in a North Powhatan Street home, county police announced Tuesday, March 12. Following the grisly discovery, officials launched a death investigation. Maria MacKnight's death was ruled a homicide from carbon monoxide poisoning, while Gregory Cunningham's death was ruled a suicide by the same manner. Their bodies w…