Cops arrested a gang member who allegedly shot a rookie NYPD officer from a Brooklyn rooftop on Independence Day, a law enforcement source said.

Police apprehended Michael Faison, 21, in Maine on charges of reckless endangerment and criminal possession of a weapon.

Faison, a Bloods gang member, allegedly shot rookie cop Jamil Sarwar in the thigh from the roof of a Cypress Hills housing project late on of July 4.

The suspect was on the rooftop engaging in a shootout with another gang when he hit the officer, a source said.

After an investigation, detectives from the 75th Precinct and the Fugitive Enforcement Task force tracked Faison down in Maine.