Anthony Maldonado was visiting relatives on LaSalle Street in Morningside Heights.
Police said at 3:00 a.m., Maldonado was playing video games on the 6th floor of the Grant Homes.
Just moments later, he was knocking on his uncle's door saying he was bleeding.
"He was in my room door. He said, 'Uncle, I'm being stabbed. I'm being stabbed,' and then he fell on the floor," said Carolos Juela, the victim's uncle.
Maldonado from Palisades Park, New Jersey, died as doctors tried to rescue him at nearby St. Luke's Hospital.
Police arrested Alejandro Morales, 25, Saturday afternoon.
Morales, described as a friend of the family, was arraigned on murder charges on Sunday.