KANSAS CITY, Kan. (AP) — A federal judge says she’ll appoint an expert to determine the scope of Sixth Amendment violations she says have been committed against inmates at a private federal prison in Kansas. U.S. District Judge Julie Robinson on Wednesday questioned federal prosecutors about how much they knew about the Corrections Corporation of America prison in Leavenworth taking silent recordings of inmate-attorney meetings and phone calls.

Federal defense attorneys say such recordings violate attorney-client privilege guaranteed by the U.S. Constitution.

The judge later told the courtroom that an assistant prosecutor had entered her chambers Aug. 25 while she was on vacation. That’s where some evidence taken from the prison was being held.

The judge stopped short of calling the prosecutor’s actions sinister but said she felt everyone needed to know what had happened.