The police did not release the names of the victims yesterday because investigators had not yet conducted lineups to see if the victims could identify the youths.

Despite our efforts, the judiciary has refused to order prosecutors to conduct sequential lineups.

He watched police officers conduct searches, lineups, interrogations and interviews.

The police are reluctant to discuss how they conduct lineups or use photo arrays.

Yesterday in State Supreme Court in the Bronx, as the suspects in Officer McDonald's killing were arraigned on second-degree murder charges, Justice Burton B. Roberts approved prosecutors' requests to conduct lineups in the robberies.

But even though the experts are confident that they have found a better way to conduct lineups, they have had a difficult time convincing law enforcement officials.

Police plan to conduct lineups in the other four cases soon.

The police were conducting other lineups yesterday.

"We have conducted lineups," said John J. Hill, the chief of detectives in Manhattan.

The police held him on a parole violation, then conducted lineups for separate cases of kidnapping in Queens.