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Authorities say the deputy U.S. marshal accused of peeping on a 16-year-old girl at Target recorded young girls at several other stores in Bismarck.

"This isn't just a couple of pictures," said Burleigh County Assistant State's Attorney Julie Lawyer at an initial court appearance for Michael Rivera on 20 new charges. "It appears wherever he goes, he does behavior like this."

A complaint filed in the case alleges the 29-year-old law enforcement officer used a cellphone camera to record under the doors of changing rooms at numerous clothing stores, including several at the Kirkwood Mall. The 19 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 prior to his initial arrest, according to Paul Ward, U.S. Marshal for the District of North Dakota. He was suspended immediately after he was detained, and then put on an indefinite, unpaid suspension ten days later.