A third suspect has pleaded guilty in a shooting death near the Centralia Civil War battlefield site a couple years ago.
Richard Henry on Monday admitted to a lesser charge of voluntary manslaughter. Sentencing is in June.
Henry was accused of murder in the death of Leon Wilder in 2017. Prosecutors say it was a drug deal gone bad.
Arline Diedrich and Justin Traughber pleaded guilty to lesser charges of drug trafficking last year. Traughber is serving a nine-year sentence. Diedrich got ten years.
(This story was last updated at 6:43 a.m. Tuesday.)