Mr. Greco, convicted of 58 murders at a Mafia trial in Palermo in December, was responsible for many of the Mafia's most notorious killings.

Last month the Senate approved a proposal that would tie some $90 million in American aid to Haiti in 1996 to further investigation of the most notorious killings.

Waiting for Parole In Notorious Abuse Case It was one of the most notorious killings of the 1980's.

Mr. Grossman also criticized the judicial system for "inefficiency and bias," and lamented that none of Mexico's most notorious political killings have been solved.

The notorious 1955 killing of Emmett Till became the subject of an open criminal investigation last week when the Justice Department agreed to re-examine the case.

The most notorious killings - the Tlatelolco massacre, named for the neighborhood in which it happened - took place just before the 1968 Olympics in Mexico City.

The most notorious killings, however, have involved the hostels built for migratory working men in the cities and industrial parks of the Transvaal.

Until the convictions, Stephen's murder was the country's most notorious unsolved killing.

Mr. Killen's trial is one of several recent efforts by prosecutors to revisit notorious killings from the civil rights era.

The government also announced its intention to set up a special commission to look at some notorious unsolved killings and major corruption cases during the Moi years.