Phone calls of defendants held in state prison before their trial may be recorded and sent to prosecutors to use against them in court without a warrant, the Court of Appeals said in a decision Thursday.

Associate Judge Paul Feinman wrote in the court’s opinion that allowing those recordings to be sent to, and used by, prosecutors without a warrant or the consent of pretrial detainees does not violate the U.S. Constitution, as was alleged by the defendant in the case.