Richard Goss with the Oklahoma State Bureau of Investigation says a medical examiner confirms David Daniel committed suicide in his Cotton County Jail cell last month.
Daniel was charged with first degree murder in the January death of 52-year-old Teresa Speir.
Officials say a jail trustee serving breakfast found Daniel's body early one mid-December morning.
They say it appears Daniel used his underwear tied to his cell door to hang himself.
Copyright 2016 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.