BOSTON — Authorities are investigating the death of a man taken into police custody after the Celtics' NBA Finals win earlier this month, police said.

Police allege David Woodman, 22, was drinking from an open container of what they believed was alcohol following the Celtic's June 18 victory.

Police said Woodman fled when they approached him and struggled as they tried to handcuff him. Police said they realized Woodman was in medical distress and began administering CPR and called for an ambulance.

Woodman was taken to Beth Israel Medical Center and listed in critical condition. He died Sunday.

Suffolk County District Attorney's Office, the Boston Police Homicide Unit and the Boston Police Internal Affairs Division are investigating the circumstances of Woodman's death, police said. Investigators are awaiting the results of Woodman's autopsy to determine the cause and manner of his death.