A noncommissioned Army officer who was once in charge of White House communications equipment at Mar-a-Lago, President Trump’s private club in Palm Beach, Fla., was sentenced to three years of probation on Friday for lying to a federal officer during a child pornography investigation, court documents show.

According to an initial charging document, the officer, Staff Sgt. Richard Ciccarella, told a Department of Homeland Security special agent in March 2018 that an email address belonging to him was not his. He was charged with one count of making a false statement to a federal officer, a felony punishable by up to five years in prison .

The authorities began investigating Sergeant Ciccarella after he uploaded photos of an underage girl to a Russian website from November 2017 to February 2018, court documents said.

Under the user name RICH25N, Sergeant Ciccarella uploaded several photographs of the girl, including one that he titled “dirty comments welcomed” in which she was wearing only underwear and standing next to a Christmas tree, and another of her playing a board game, documents said.