FARGO-A former deputy U.S. marshal in Bismarck pleaded guilty in federal court here on Thursday, Jan. 26, to one count of attempting to receive images sexually exploiting minors.

Michael D. Rivera, 29, is to be sentenced on April 18.

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As part of a plea agreement, Rivera admitted downloading sexually explicit images of young teens.

The pictures and videos were discovered during an investigation involving a separate case in which Rivera is charged in Burleigh County District Court with recording images of women in retail dressing rooms around Bismarck.

In the federal case, the charge Rivera pleaded guilty to carries a minimum mandatory term of five years in prison and a maximum prison term of 20 years.

During his plea hearing Thursday before U.S. District Court Judge Ralph Erickson, Rivera made no statements other than to to give respectful answers when questioned by the judge.

In the case in state court, court documents allege Rivera used a cellphone camera to record under the doors of changing rooms at numerous clothing stores, including several at the Kirkwood Mall. More than a dozen victims identified by their initials in the complaint range in age from 12 to 33 years old.

Rivera worked for the U.S. Marshals Office for about a year before his initial arrest.