CRIPPLE CREEK, Colo. (AP) — Prosecutors will be permitted to conduct DNA testing on a tooth fragment found on the ranch of a Colorado man suspected of killing the mother of his child and burning her body, a judge ruled Friday. The Gazette reports that investigators discovered the fragment while searching a ranch owned by Patrick Frazee, who has pleaded not guilty to killing Kelsey Berreth.

District Judge Scott Sells ruled that the Colorado Bureau of Investigation may proceed with the testing in the presence of attorneys for Frazee. Berreth, a 29-year-old flight instructor, was last seen on Nov. 22, 2018, at a supermarket near her home in the mountain community of Woodland Park, about two hours south of Denver. The search for her started on Dec. 2, when her mother reported her missing. Her body has not been found. Berreth and Frazee were engaged, but they lived in separate homes.