Pittsburgh Bureau of Police investigators arrested an adult male and two juvenile males for an unprovoked assault on a developmentally-disabled victim.

The arrests, on Nov. 6, followed an investigation into an incident that occurred Oct. 26 just after 1 a.m. on the 500 block of Brookline Boulevard.

Zone 6 officers on patrol were flagged down and alerted to an assault that occurred just outside the Moonlight Café. When police spoke with the victim, a 38-year-old male, they realized he was developmentally disabled. The male was extremely scared. Officers observed injuries to his face.

The victim was taken to a local hospital to be treated for his injuries while police reviewed surveillance footage from the restaurant.

The footage shows three males approach the victim as he was standing by a parking meter. They punched and kicked the victim in the head and torso multiple times while he was standing, then continued to assault him after he fell to the ground. One of the males is observed going through the victim’s pockets while he was on the ground.

Abdullaah Francken, 19, of Brookline was arrested and charged with aggravated assault, robbery and criminal conspiracy. Two juvenile males -- a 16-year-old and a 17-year-old -- were also arrested.