Warren Grignon (Photo courtesy: Brown County Sheriff's Office)
KESHENA (WTAQ-WLUK) — A Keshena man will spend more than a decade behind bars for smuggling fentanyl into the Menominee Tribal Jail, leading to three overdoses — one of which was fatal.
On Thursday, 43-year-old Warren Grignon was sentenced for distributing fentanyl to his fellow inmates. He pleaded guilty in February to charges of involuntary manslaughter and distribution of controlled substances.
Grignon was sentenced to 12 years in prison for the distribution of controlled substances and a concurrent eight years in prison for the involuntary manslaughter count.
According to officials, Grignon was booked into the Menominee Tribal Jail on December 22, 2023, and moved into a cell with other inmates the following day.
Grignon distributed a substance containing fentanyl to three other inmates, all of whom ingested the drug and overdosed. Responding jail personnel, tribal police and EMTs managed to revive two of the inmates, but one died.
Following his prison sentence, Grignon will be on supervised release for10 years. He was also ordered to pay nearly $7,000 in restitution to the victim’s family.





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