The Shirley man shot and killed after firing 15 rounds at officers Friday was identified as a Long Island Rail Road worker, authorities said Tuesday.
Paul M. Caruso, 46, had worked for the railroad since May 1994, and was a radio man at the Babylon facility, said LIRR spokesman Salvatore Arena.
Caruso's friends told authorities that he was a conspiracy theorist and had grown increasingly concerned about what he believed was government surveillance, a source said.
He started a 10-minute standoff and shootout with officers Friday night that ended with him dead on his front lawn on Carleton Drive East, police said.
Caruso had friends, but neighbors said he kept mostly to himself and a relative said he had lost touch with most family members.
"My uncle has not been in our lives for 10 years," said nephew Gary Caruso, 23, of Westchester.
The nephew said his father last year reached out to his brother to tell him he was dying of brain cancer and wanted to see him.
Gary Caruso said his uncle rebuffed his sibling: "We lost our father to brain cancer in October. He did not show up for my father's funeral . . . After my grandma passed away when I was 10, it seemed like he lost contact with the family and didn't want to be a part of it."
Seventh Precinct officers had been called to Caruso's home about 10:30 p.m. by neighbors who heard a man yelling about New York City Mayor Michael Bloomberg and firing a weapon.
When officers approached the back of the house, Caruso fired his shotgun five times and police scrambled for cover, firing back, authorities said.
Caruso then retreated inside but returned minutes later, shooting through a front screen door, this time with a rifle, while wearing a military-style helmet and a ballistic vest, police said.
In all, he fired 15 rounds, police said, but no officers were hurt.