Police say 19-year-old Victor Maldonado intervened after the broke out between two girls because one of them didn't thank the other for opening a door.
While he was trying to play peacemaker, police say one of the girl's brother fatally shot him. Now, 34-year-old DeShawn Coleman is being charged with murder in the case.
There was strength in numbers for Maldonado's family and friends Tuesday night. They gathered in the Bronx, comforting each other and trying to make sense of the violence that claimed his promising life.
His sister is devastated.
"It''s just wrong," Nayiliana Dejesus said. "It didn't have to become murder."
Maldonado planned to enlist in the Navy in a few months.
Get Eyewitness News Delivered