Bryan Kohberger, the former criminology grad student accused of killing four University of Idaho students in November 2022, appeared in court Thursday morning in one of the last pretrial hearings before the start of his much-anticipated trial.

A defense expert who may testify at trial believes the crime would have required two perpetrators and two weapons, a defense attorney said.

Last week, NBC's Dateline released videos of "never-before-reported" evidence in the Moscow Murder trial. The episode included photos, videos and other digital materials from the investigation, including footage of a white car investigators say was seen in the area around the time of the killings.

BOISE, Idaho - A judge will decide next month if Bryan Kohberger's defense team can introduce information that someone else killed four University of Idaho students.

The identity of the alternate suspect named by Kohberger and the evidence his defense team claims links this person to the grisly killings remain a mystery.

Digital materials and documents obtained by "Dateline" track the suspect's movements before and after four University of Idaho students were killed in 2022.

NBC's Dateline will air a special featuring evidence in the trial of Brian Kohberger, accused of killing four University of Idaho students.

Angela Navejas' daughter, Ashlin Couch, previously lived with some of the victims of the Idaho student slaying.