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Updated at 7 p.m. ET: NEW YORK -- The suspect in the deadly shooting of a Nassau County police officer during a traffic stop Tuesday has been captured in Queens, law enforcement sources said.
Darrell Fuller, 33, was located along 175th Street and 111th Avenue and appeared to have two gunshot wounds, sources said.
Police had been hunting Fuller after he allegedly shot the officer during a traffic stop before gunning down a motorist as he tried to get away along the border of Queens and Long Island Tuesday.
Authorities said Officer Arthur Lopez, 29, and another Nassau officer were heading north on Northern Boulevard when they saw a vehicle leave the scene of an accident near the Queens border.
They pulled over the suspect, who was driving a Honda, and he began firing at them after a short conversation, killing Lopez, law enforcement officials said. Lopez was not wearing a bulletproof vest; the other officer was not shot.
The suspect took off, ditching the car before carjacking a Toyota and shooting its driver in the head.
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That Toyota was later found abandoned. Police have identified a possible suspect, Darrell Fuller, 33, by tracing the registration on the Honda, sources tell NBC 4 New York.
A man who said he witnessed the shooting while he was stopped at a gas station along the highway said it happened during what looked like a routine traffic stop.
"The officer's walking up to the car. They just pulled out and shot," said Paul Walcott, a music producer from Bayside, Queens. "He went right down. He got hit point blank. He went straight down."
Nearby schools were put on lockdown while police searched for the suspect, Department of Education officials said. Residents were also told to stay in their homes while police went from house to house.
It was the second time in the past week that a Nassau County officer has died in the line of duty. Highway patrolman Joseph Olivieri was killed Thursday while responding to a traffic accident caused by an alleged drunk driver.
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Lopez was an eight-year veteran of the department and was a volunteer firefighter on Long Island.
Nassau County PBA President James Carter described him as "full of life, full of energy, a great cop and a great friend."
An arrest warrant was issued for Fuller, who has two prior arrests: one in October 2004 for attempted murder and another in March 2010 for possession of drugs, according to law enforcement sources.
He was sentenced to five years in prison after pleading guilty to the attempted murder charge and is currently on parole, sources said.