A male convicted in Coos County for the 1997 death of Marine Lance Corporal Ronald Shellenbarger has died in prison. According to a news release from District Attorney R. Paul Frasier, Zyzmick Duane Tregeagle, also known as Duane Dinius, was serving a life sentence and was in a Montana prison as part of an agreement between the Oregon Department of Corrections and the State of Montana. Frasier adds that he has not been officially informed of the circumstances or manner of death, but an autopsy has been ordered.