Attorneys sparring over investigation materials from the 1959 “In Cold Blood” murders in southwest Kansas are headed to court.

A motions hearing was scheduled Thursday in Shawnee County District Court to discuss what evidence the attorneys will exchange.

At issue are case files kept at the home of a deceased Kansas Bureau of Investigation agent who was part of the probe into the killings of Herb and Bonnie Clutter and two of their children at their farmhouse in Holcomb. The murder case became the subject of Truman Capote’s novel “In Cold Blood.”

The state argues the late agent’s family doesn’t own the case files. The state wants the materials returned and their sale, publication or distribution prohibited.