Monroe County, WI – Authorities have arrested a man allegedly connected to the August drug overdose death of a 28-year-old in the City of Tomah. The Monroe County Sheriff’s Office announced the arrest Wednesday and said the case remains active with additional charges possible.
According to the Sheriff’s Office, 54-year-old Harley Carlson of Tomah was taken into custody on a charge of 1st Degree Reckless Homicide/Deliver Drugs after investigators determined he allegedly supplied fentanyl to another person, who then sold it to the victim. The fatal overdose occurred in August, prompting a multi-agency investigation that continued through the fall.
Carlson is expected to appear in Monroe County Circuit Court Thursday, December 5, 2025, at 1 p.m. for a bond hearing. The session will be viewable online through the Monroe County Clerk of Courts website.
According to investigators, the case involved coordinated work by the Monroe County Sheriff’s Office, the Tomah Police Department, the Monroe County Medical Examiner’s Office, and the Holmen Police Department. Authorities emphasized that the probe is not complete, and more arrests or charges may be forthcoming as they continue tracking the chain of distribution that led to the victim’s death.
Community members in Tomah and surrounding Monroe County have expressed concern over rising fentanyl-related cases, which law enforcement leaders say continue to pose an urgent regional threat. Officials urge residents with information related to this or other drug investigations to contact the Sheriff’s Office.
This article was produced by a journalist and may include AI-assisted input. All content is reviewed for accuracy and fairness.
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