A U.S. Secret Service officer, John Andrew Spillman, 33, has been placed on administrative leave after being arrested in Miami for allegedly exposing and fondling himself in a hotel hallway.

Police say he was found naked on the sixth floor of a DoubleTree hotel and was later accused by a witness of following her from the lobby and behaving inappropriately near her room.

Hotel security also reportedly observed similar conduct before officers detained him.

Spillman had been off duty after working a security detail at a major golf tournament attended by Donald Trump, The Guardian has reported.

The Secret Service called the alleged behavior “unacceptable” and said an internal investigation is underway while the criminal case proceeds.