A former Oshkosh Correctional Institution guard is serving prison time for sexually assaulting an incarcerated person in 2024.
Brandon Jeanpierre, 35, of Calumet City, Illinois, pleaded no contest in January to one count of third-degree sexual assault and was sentenced April 9 in Winnebago County Circuit Court to two years in prison, followed by five years of extended supervision.
According to a criminal complaint, the victim reported that Jeanpierre touched the victim inappropriately several times and performed oral sex on the victim in a laundry room at the Oshkosh Correctional Institution on Oct. 30, 2024.
The victim said he didn’t consent to any of the contact, but “simply went along with it because he did not know what else to do,” the complaint said.
According the complaint, the victim feared retaliation if he reported the incidents, but disclosed them to his girlfriend over the phone and another incarcerated person the next morning.
A video at the Oshkosh Correctional Institution depicted three or four instances on the evening of Oct. 30, 2024, during which the victim and Jeanpierre went into the laundry room with the lights off. They were always in the room for “a matter of seconds,” the longest lasting 30 to 40 seconds, the complaint said. There was no video available from inside the laundry room.
In a victim impact statement filed in the case in 2025, the victim wrote that the assault has negatively impacted his mental health, bringing back anger and depression he “worked years to fight through, only to relive it all as a middle aged man.”
“Mentally and emotionally I’ve suffered immeasurable pain,” the statement said. “Being taken advantage of by someone who was supposed to protect me has caused me to regress to when I was taken advantage of as a child.”
Jeanpierre was initially charged with two counts of second-degree sexual assault by correctional staff, a weightier offense that could have carried more prison time. The charges were amended in a plea deal.
Jeanpierre’s conviction and sentencing was first reported by the Wisconsin Examiner.
The Wisconsin Department of Corrections didn’t immediately respond to an inquiry about how long Jeanpierre was employed with the department, and when he left.
According to records from the DOC, in 2024, Wisconsin prisons had six substantiated instances of staff-on-incarcerated-person sexual abuse. In addition to one at the Oshkosh prison, the others occurred at the Columbia Correctional Institution, the Kettle Moraine Correctional Institution, the Oakhill Correctional Center, the Taycheedah Correctional Institution and the Wisconsin Secure Program Facility.
The DOC defines substantiated instances as those that were investigated and determined to have occurred. Sixty more instances of staff-on-incarcerated-person sexual abuse and sexual harassment that year were considered unsubstantiated, meaning an allegation was investigated and but there was insufficient evidence to determine whether it occurred. Another 42 instances were unfounded, meaning the allegation was determined to have been false.
The 2024 report is the most recent available on the DOC’s website. Substantiated staff-on-incarcerated-person sexual abuse instances increased from four in 2023, but were down from 10 in 2022 and 21 in 2021.
Contact Kelli Arseneau at (920) 213-3721 or karseneau@gannett.com. Follow her on X at @ArseneauKelli.
This article originally appeared on Milwaukee Journal Sentinel: Former Oshkosh Correctional guard gets prison time for sexual assault
Reporting by Kelli Arseneau, Milwaukee Journal Sentinel / Milwaukee Journal Sentinel
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By Kelli Arseneau, Milwaukee Journal Sentinel | USA TODAY Network
