BOISE, Idaho (AP) — A judge entered not guilty pleas Monday for a man charged in the stabbing deaths of four University of Idaho students, setting the stage for a trial in which he could potentially face the death penalty.

The Nov. 13, 2022, killings stunned the rural community of Moscow, Idaho, and prompted many students to leave campus early, switching to remote learning for the remainder of the semester.

Bryan Kohberger, 28, was arrested late last year and charged with burglary and four counts of first-degree murder in connection with with the slayings of Madison Mogen, Kaylee Goncalves, Xana Kernodle and Ethan Chapin at a rental home near the University of Idaho campus.

Kohberger refused to enter pleas in Latah County District Court, prompting the judge to make them on his behalf.

The judge set the trial date for Oct. 2, although it could be delayed.

He was a graduate student studying criminology at nearby Washington State University at the time, but prosecutors have not released any information about how he may have chosen the victims or whether he had met any of them previously.

Police released few details about the investigation until after Kohberger was arrested at his parents’ home in eastern Pennsylvania early Dec. 30, 2022. Court documents detailed how police pieced together DNA evidence, cellphone data and surveillance video that they say links Kohberger to the slayings.

Investigators said traces of DNA found on a knife sheath inside the home where the students were killed matches Kohberger, and that a cellphone belonging to Kohberger was near the victims’ home on a dozen occasions prior to the killings. A white sedan allegedly matching one owned by Kohberger was caught on surveillance footage repeatedly cruising past the rental home around the time of the killings.

Kernodle, Chapin, Mogen and Goncalves were friends and members of the university’s Greek system, and the three women lived together in the rental home just across the street from campus. Chapin — Kernodle’s boyfriend — was there visiting on the night of the attack.

Latah County Prosecutor Bill Thompson now has 60 days to inform the court whether he will seek the death penalty in the case.