KESHENA, WI (WTAQ-WLUK) — A Menominee Tribal Detention Center inmate accused of smuggling fentanyl into jail, causing three other inmates to overdose and one of them to die, plead guilty.
Judge William C. Griesbach accepted the guilty pleas of Warren J. Grignon, 42, to one count of distribution of fentanyl and one count of involuntary manslaughter.
According to the indictment and plea agreement, on Dec. 23, 2024, Grignon distributed fentanyl he smuggled into the jail to three other inmates. All three inmates overdosed. Two inmates were revived through the efforts of additional inmates, corrections staff, and responding officers. One inmate could not be revived and was pronounced dead. A later autopsy revealed the cause of death to be a fentanyl overdose.
A sentencing hearing is scheduled for May 16.
Grignon faces a total sentence of up to 28 years in prison as well as fines and assessments for each count. Grignon also faces a minimum term of three years, and up to a lifetime of supervised release after completing any period of imprisonment.
