Matthew Watson, a 2002 graduate of George Mason High School in Falls Church, died Wednesday after an altercation in Alexandria, police report.

Fairfax Count Police say that Watson, 36, sustained life threatening injuries during an altercation near the Beacon Hill apartments on Wednesday, Feb. 21. Officers responded to the 6600 block of Tower Drive for a report of an unresponsive man who was later identified as Watson of Alexandria.

He was taken to an area hospital where he succumbed to his injuries.

Fairfax County detectives have identified the other person involved, who is believed to have been known to Watson. The circumstances of the altercation are still being investigated.

The Office of the Chief Medical Examiner has conducted an autopsy but has not yet ruled on cause and manner of death. Police say criminal responsibility will be determined pending further investigation and consultation with the Office of the Commonwealth Attorney.