Teen dies after being shot through open window of NW Side home

A 17-year-old boy died this morning, a day after a gunman fired a shot through an open window of his Northwest Side home.
The teen, Valentin Bahena, was pronounced dead at 12:18 a.m. at Stroger Hospital
Bahena had been hospitalized since he was shot in the head inside his mother's bedroom just after 3 a.m. Sunday at his family's home in the 2200 block of North Lawler Avenue
The teen was leaning out the second-floor window asking two men standing in the gangway below what they were doing there.
Just then, a relative heard a gunshot and found Bahena lying on the floor.
The shooting happened just after Bahena quarreled with another person outside his apartment.
It was unclear whether the verbal altercation led to the shooting.
Police didn't offer a motive for the shooting, but noted that Bahena had a gang affiliation.