BISMARCK, N.D. (AP) — A former deputy U.S. marshal convicted of spying on young women in store dressing rooms in Bismarck is appealing his three-year state prison sentence.

Thirty-year-old Michael Rivera was convicted in February of misdemeanors including surreptitious intrusion and creating and attempting to create sexually expressive images. He was sentenced in June to serve three consecutive one-year sentences.

The Bismarck Tribune reports that Rivera attorney Lloyd Suhr argued before the state Supreme Court on Thursday that a total sentence of one year should be imposed because the offenses were identical in nature.

Burleigh County Assistant State's Attorney Julie Lawyer argued Rivera committed crimes on separate days in separate locations against separate victims.

Justices will rule later.

Rivera's state sentence will begin once he finishes a seven-year federal sentence for child pornography.

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Information from: Bismarck Tribune, http://www.bismarcktribune.com