SALT LAKE CITY (AP) — A tech worker pleaded guilty to strangling a Utah college student whose disappearance over a year ago sparked a search that ended with the discovery of her charred remains in his backyard. The pleas entered Wednesday by Ayoola Ajayi came more than a year after the death of 23-year-old Mackenzie Lueck. She went missing in June 2019, after returning from a trip home to California and meeting Ajayi in a park. Authorities searched for two weeks before finding charred remains in his backyard and her bound body in a canyon. Ajayi is expected to be sentenced to life in prison without parole.