Prosecutors have not offered a plea deal. No guarantee that if he pleads guilty, he still will not be sentenced to death. Utah has some strange rules about aggravated murder. It can be mitigated down but there are several specific requirements, none of which appear to have been met in this case. Read an article in Newsweek on it while sitting at the dentist. Article seemed to indicate that this mitigation deal was his only way to avoid the DP.