A George Washington University grad student and Army veteran was part of last week's altercation outside of a McDonald's at 19th and M streets in which he suffered critical injuries, according to D.C. police.
Patrick Casey died after the altercation. Casey's parents said they believed their son was breaking up a fight, but on Friday, police confirmed that Casey was involved in the fight.
Casey or someone else in the group he was with hit or punched another individual and then Casey was punched. Police said he fell to the ground and hit his head, leaving him brain dead.
Police said they have interviewed all the suspects involved in the case.
They are still trying to determine what charges will be filed. If it is determined that the event was simply an altercation, only misdemeanor charges would be allowed.
An autopsy report confirmed that Casey died of blunt force trauma to the head.