An Arlington man who was found lying on the ground on Wisconsin Avenue NW in the District in June has died, and his death was ruled a homicide, authorities said Monday.

Michael Hrizuk, 57, was found about 1:50 a.m. on June 21 in the 2300 block of the avenue, in the Glover Park area, after an assault was reported there, police said. He was taken to a hospital and died July 2. His death was attributed to “blunt impact head injury,” the police said Monday.

His brother Bill said Hrizuk fell and struck his head during an altercation outside a bar. A married Air Force veteran, Hrizuk retired about five years ago as a civilian air traffic controller at Reagan National Airport, his brother said. Over his lifetime, his brother said, Hrizuk “gave [to society] a little more than he took.”