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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 were found by police performing a welfare check on Dec. 7, 2023.
Anyone with information has been asked to contact the Arlington County Police Department's Homicide/Robbery unit by calling (703) 228-4180.
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