A federal judge has refused to suppress evidence in a government case that accused the Hollywood private investigator Anthony Pellicano of illegally wiretapping stars.

Judge Dale S. Fischer of Federal District Court issued six separate rulings on Friday that went against Mr. Pellicano and five co-defendants. The motions sought to suppress evidence that the defense argued had been mishandled or obtained through government misconduct. That included recordings of Mr. Pellicano’s telephone conversations that were seized in a search of his Sunset Strip offices four years ago.

One of the motions sought to have the entire criminal indictment dismissed.

“We are extremely pleased with the court’s ruling,” said Thom Mrozek, a spokesman for the United States attorney’s office in Los Angeles.

Lawyers for Mr. Pellicano declined to comment on the rulings after the hearing.

A lawyer for a co-defendant, the prominent California lawyer Terry Christensen, said an appeal would be considered.

“At the very least, we thought we were entitled to evidentiary hearings to determine the seriousness of the government mistakes in this case,” the lawyer, Terree A. Bowers, said.

Mr. Pellicano is in federal custody pending trial. An indictment accused him of tapping phones and bribing police to get information on celebrities like Sylvester Stallone and Garry Shandling.

Mr. Pellicano and the other defendants have pleaded not guilty to wiretapping and conspiracy.