Isaiah Lee, also 18, was at his home in the Hammel Houses on Beach Channel Drive in Arverne when he heard somebody knocking on his door at about 12:45 p.m., law enforcement sources said.
When Lee cracked open the door, the gunman pumped bullets into his head and chest before running off.
Sources said the shooting may have stemmed from a fight over a woman.
Lee died at St. John’s Episcopal Hospital.
Green had been busted for robbery last month.
Neighbors remembered Lee as a good kid who loved to shoot hoops on the complex’s basketball courts.
“He never was a troublemaker,” said friend Carleen Mitchell.
“It’s just sad…[to lose] a young life, a good life.”