CNN
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Lawyers for Sean “Diddy” Combs accused federal prosecutors of “outrageous” conduct for obtaining the former music mogul’s personal notes from his prison cell.

Combs’ attorneys said in a letter to the judge in his case that the notes contained attorney-client material about defense witnesses and strategy. They described the search as a violation of his constitutional rights.

“The targeted seizure of a pretrial detainee’s work product and privileged materials – made in preparation for trial – is outrageous government conduct that amounts to a substantial violation of due process,” Combs’ attorneys wrote.

They asked Judge Arun Subramanian to hold an evidentiary hearing.

Combs has been held at the Metropolitan Detention Center since his arrest in September. He has pleaded not guilty to federal charges of sex trafficking, racketeering and transportation to engage in prostitution and denied all allegations of wrongdoing.

His attorneys said they first learned late Friday night that prosecutors were in possession of his court filings.

In the filing, prosecutors disclosed that the notes were obtained during a nationwide pre-planned investigation of Bureau of Prison facilities. They suggested, based in part on the notes, that Combs tried to influence witnesses prior to his trial.

“The strong inference that can be drawn from the defendant’s communications with Witness-2 and his personal notes is that the defendant paid Witness-2 after she posted her statement,” prosecutors wrote in the filing.

Prosecutors said the notes were reviewed by a filtering team of people not involved in the case for privileged material before they were turned over.

Combs’ attorneys said they want to know who authorized a search of Combs’ area, who gave the paperwork to the U.S. Attorney’s Office and what materials were taken.

Combs is scheduled to appear in court Friday as his attorneys try for a third time to get him released on bail.