Four men involved in the March 2003 execution-style slaying of two Staten Island detectives during an undercover gun purchase operation submitted guilty pleas yesterday.

Standing before U.S. District Judge Nicholas Garaufis of Brooklyn, the four men, Paris Bullock, Jamal Brown, Angel Rodriguez, all 23, and Michael Whitten, 22, pleaded guilty to racketeering charges.

The four and the accused triggerman, Ronnell Wilson, 23, were reputed to be members of the Stapleton Crew, a gang that allegedly specialized in gun trafficking and drug dealing on Staten Island. The undercover detectives, James Nemorin, 36, and Rodney Andrews, 34, were investigating gun trafficking among the gang members when Mr. Wilson allegedly shot the detectives.

At the April 7 sentencing, Whitten is expected to receive a 27-year prison term, while Bullock is expected to get 25 years, Brown 12 years, and Rodriguez 10 years, according to the spokesman for the U.S. Attorney’s Office for the Eastern District of New York, Richard Nardoza. The four defendants pleaded guilty to racketeering charges, and Whitten and Bullock also admitted involvement in a cocaine distribution conspiracy and in robbing the two detectives, Mr. Nardoza said.

Mr. Wilson’s case is scheduled to go to trial next September. Should he be convicted, he could face the death penalty.

The court proceedings yesterday came on the same day that Allan Cameron, 27, was indicted on charges of murder in the killing of Officer Dillon Stewart, 35, during a chase on Monday in East Flatbush. Mr. Cameron was also indicted on charges of attempted murder in the shooting of another police officer, Weiner Philippe, 26, during a November 19 robbery in Crown Heights.

Stewart’s wake and funeral dates were established yesterday. His wake will be held Monday from 2 p.m.to 9 p.m. at New Life Tabernacle UPC, at 4905 Avenue D, in East Flatbush, Brooklyn. The funeral service will be the following day at 9:30 a.m. at the same location.

On Wednesday, Governor Pataki visited the 70th Precinct, where Stewart worked, and spoke of the need for Albany to pass his gun trafficking legislation. Mr. Pataki also lobbied for the bill in March, on the two-year anniversary of the Staten Island detectives’ deaths. The bill was first introduced in 2001, and the governor has maintained that it has been stymied in the Democraticled Assembly.

“There are too many illegal guns on the streets of New York, and our laws are too easy,” Mr. Pataki said.

A spokesman for Assembly Speaker Sheldon Silver, Charles Carrier, said the Assembly has adopted its own 10-bill package that would crack down on gun trafficking. “We have been leading these fights for years,” Mr.Carrier said. “I urge him to ask his Republican colleagues to adopt out tougher bill package.”