An Idaho judge gave quadruple murder suspect Bryan Kohberger’s defense a minor victory last week after denying their efforts to dismiss the indictment against him for the stabbing deaths of four university students last year.

Kohberger, who is accused of killing Madison Mogen, Kaylee Goncalves, Xana Kernodle and Ethan Chapin in a 4 a.m. ambush in an off-campus rental home, is seeking specific details about how law enforcement used investigative genetic genealogy (IGG) to thumb him as a suspect after he allegedly left a Ka-Bar knife sheath with his DNA on it under Mogen’s body.

In a 32-page order, Judge John Judge granted a request for an in-camera review of the IGG evidence.