A corrections officer at Crossroads Correctional Center, two inmates and the wife of one of the inmates are charged with conspiring to bring drugs into the private prison in Shelby.

Three of the four are scheduled to be arraigned in Great Falls next Wednesday.

The case began in July when a confidential informant told the Department of Corrections that officer Diana Baker was involved in a relationship with inmate Joshua Schied.

Court records say an investigation of that alleged relationship and contact with the informant led to an operation in which the informant sold fake meth to Baker in Great Falls.