(POCATELLO, ID) — Four people have pleaded guilty to their respective roles in an eastern Idaho meth ring. 31-year-old Isidoro Herrerra, 22-year-old Alberto Abarca, and 29-year-old Nicolas Olsen, all of Idaho Falls, as well as Ana Valdez-Ceja of Shelley, admitted to being part of a large drug trafficking organization. The group is accused of dealing more than a half-million dollars in methamphetamine. 13 defendants in the case have pleaded guilty thus far. Sentencing is scheduled for later this Spring.