Police answering a 911 call in October 2012 said the man bleeding on a Queens street that night wouldn't say who shot him or what the shooter looked like.
He spoke only two words, but they were all NYPD officials needed to hear to arrest him hours after a Nassau cop was killed, according to pretrial testimony in Nassau County Court Friday.
"Listen, what's your name?" NYPD Officer Michael Boyle said from the witness stand, recalling his exchange with the suspect.
"My sergeant shined the light on his face, and he said, 'Darrell Fuller,' " Boyle said.
The officer testified that he and his sergeant then handcuffed Fuller, an ex-convict, before he was loaded into an ambulance at the scene on 111th Avenue near 173rd Street.
Fuller faces first-degree murder charges in the Oct. 23, 2012, deaths of Nassau police Officer Arthur Lopez and Raymond Facey, 58, of Brooklyn.
Prosecutors say Fuller fled the scene of an accident before shooting Lopez as the 29-year-old officer approached Fuller's car near the Nassau-Queens border that morning.
Fuller drove off, then shot Facey and stole his car about a quarter-mile south on the Cross Island Parkway.
Authorities have said that Fuller, 34, "staged his own shooting" to try to make himself look like a victim.
Boyle testified Friday that police found Fuller in the road next to a van about seven hours after the slayings. There was blood coming from his right shoulder.
Boyle's testimony wrapped up three days of hearings in preparation for Fuller's trial, which is expected to start early next year.
Fuller, who has pleaded not guilty, faces life in prison without parole if convicted. His lawyer, Kenneth St. Bernard of Mineola, declined to comment after Friday's hearing.