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Minneapolis, MN (KROC-AM News) - An investigation launched by the Olmsted County Sheriff's Office has led to an Owatonna man's conviction on a federal weapon's charge.

A news release issued by the US Attorney for Minnesota says 22-year-old Dayton Charles Sauke has pleaded guilty to possession of an unregistered firearm, specifically, a "sawed-off" shotgun. The charges in the case indicated, based on information received by Olmsted County authorities, Sauke met with and showed the "short-barreled" gun to undercover agents.

As part of the investigation, the news release says law enforcement agents monitored Sauke's social media postings, which included photos of the illegal shotgun and threatening posts about killing law enforcement officers and politicians.

photo credit: US Attorney for Minnesota

A sentencing hearing for Sauke has not been scheduled.

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