Bryan Kohberger has been indicted by a grand jury in connection with the murder of four University of Idaho students.

The indictment includes charges of first-degree murder. Kohberger, a 28-year-old Ph.D. student at Washington State University, was arrested in December after a six-week search.

He will appear in court for his arraignment in Moscow, Idaho, and enter a plea.

The victims, Xana Kernodle, Kaylee Goncalves, Madison Mogen, and Ethan Chapin, were stabbed to death in the middle of the night at their off-campus house. Two other roommates survived the attack.

DNA evidence linking Kohberger to the crime was found on a knife sheath at the crime scene, and further DNA analysis matched it to Kohberger’s father.