Convicted sex offender arrested after East Towne assault - WQOW TV: Eau Claire, WI NEWS18 News, Weather, and Sports

Convicted sex offender arrested after East Towne assault

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MADISON (WKOW) -- Madison police caught up with a convicted sex offender Saturday afternoon, following an assault at East Towne Mall.

The victim, a 21-year-old man, told police he had a casual conversation with the suspect before both entered the restroom.  Once inside the restroom, the suspect forcefully grabbed the younger man's private areas and said he had just gotten "out of the pen". 

The victim broke free and immediately contacted police.  A responding officer was able to make contact with the suspect, who was walking along Commercial Avenue.  Gregory Ostern, 43, informed the officer he had been staying at shelters since his release from prison.

Ostern was arrested for second degree sexual assault.

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