It also found that several Guatemalan officers and officials covered up the military's role in the 1990 killing of an American citizen there.

He did not say whether the colonel was suspected of direct involvement or of aiding an attempt to cover up the military's role.

The prosecutors have long claimed that the police officers involved conspired to cover up Mr. Schwarz's role in the crime.

Prosecutors say Detective Silvestri tried to persuade a fellow officer, his partner, to help cover up his role.

A Brooklyn detective was charged in federal court yesterday with concealing evidence to cover up his cousin's role in a mob shooting.

He was never prosecuted, however, which later led to charges that the government engaged in a conspiracy to cover up his role.

The police and friends testified that Lewis tried to cover up his role in the deaths.

Mr. Silvestri, 46, is accused of helping to cover up his cousin's role in the mob shooting.

They have also accused Mr. Williams of trying to cover up his role in the shooting.

He and Sparrow attempt to cover up his role in the murder.