A judge overseeing the pretrial hearings for Bryan Kohberger, the former criminology grad student accused of killing four University of Idaho students in November 2022, ordered prosecutors and defense attorneys Thursday to preserve records after an apparent leak made its way into a “Dateline NBC” episode last week.

Kohberger’s attorneys have already informed the judge that they believe someone else is responsible for the pre-dawn stabbings at a student house in Moscow, Idaho — the “alternative perpetrator” theory, Judge Steven Hippler revealed. Now the judge is telling lawyers to name the suspect and offer up “any actual evidence” they have against him.