A Maine man is facing prison time for his role in the storming of the U.S. Capitol on Jan. 6, 2021.

Joshua Colgan of Jefferson pleaded guilty Thursday to one count of parading, demonstrating, and picketing in a Capitol building.

Court documents show he originally denied going inside the building.

Using a search warrant, the FBI obtained GPS data from Colgan’s phone showing he was in the Capitol building that day.

He faces up to six months behind bars, five years of probation, a fine of up to $5,000.