Three District men and a fourth from Prince George's County were arrested yesterday in North Carolina and charged in the slaying of a state trooper who was found fatally shot in his patrol car on I-95 about 30 miles south of the Virginia state line, authorities said.

Chrystal Stowe, a spokeswoman for the North Carolina Department of Crime Control and Public Safety, said the slain trooper, Raymond Earl Worley, 43, stopped two vans with Maryland license plates shortly after 5 a.m. yesterday near Roanoke Rapids, N.C. Stowe declined to say why the vehicles had been pulled over.

Worley radioed that he had stopped the vans and would supply information about the drivers. After Worley had not called in within a reasonable time, Stowe said, dispatchers became concerned.

Stowe said an unidentified person on duty at a truck-weighing station nearby was asked to investigate, and found Worley slouched behind the wheel of his patrol car with gunshot wounds to the back of the head and his left hand. A white van was found abandoned in front of Worley's car.

Maj. Robert Barefoot, of the state highway patrol, said a trooper preparing to join a search for Worley's killers was backing out of his driveway when he spotted a man walking along U.S. 301 about a mile from where Worley was found.

Barefoot said the trooper questioned the man and arrested him after he discovered he was carrying a small-caliber pistol.

The man was identified by Barefoot as Alex Trainie Allen, 34, of the District. He was charged with first-degree murder in Worley's death, Barefoot said. Allen is wanted on an outstanding burglary warrant in the District, Barefoot said.

About four hours after Allen's arrest, a farmer reported to police that another van was parked on his property. FBI agents and officers from at least 10 police jurisdictions, some in helicopters and others with bloodhounds, converged on the area and found three men hiding near the farm.

Barefoot identified the men as Antonio Worrell, 29, of the 5600 block of 54th Avenue, Riverdale, Md., and Mack Eugene Green and Timothy Allen, both of the District. They were charged with accessory after the fact of first-degree murder and two counts each of felonious possession of stolen property, he said..

Police said the van found on the farmer's property bore Maryland license plates, but had been reported stolen in Florida. They said they had not determined who owned the other van.

Police said the ages and addresses of Green and the Allens were not immediately available, nor could it be determined whether the Allens are related. All four suspects were being held at the Halifax County jail pending arraignment today.

Worley, a 23-year veteran of the state force, was married and had two daughters.