Attorneys for defendant Bryan Kohberger contend most of the evidence in the case hinges on an unconstitutional genetic investigation process.

Bryan Kohberger is charged with four counts of murder in the deaths of Ethan Chapin, Xana Kernodle, Madison Mogen and Kaylee Goncalves.

Attorneys for a man charged with murder in connection with the killings of four University of Idaho students are asking a judge to throw out most of the evidence in the case because they say it all hinges on an unconstitutional genetic investigation process.