U.S. Capitol police officer push back people who are watching workers remove the fence surrounding the U.S. Capitol building, after six months was erected, following the Jan. 6 riot at the Capitol, on Saturday, July 10, 2021, in Washington.

A Florida man who was part of a white supremacist prison gang when he served time for attempted murder pleaded guilty Monday to joining the mob that stormed the U.S. Capitol, and will be released from jail this week after serving six months for his role in the Jan. 6 riot.

Michael Curzio, who has been locked up since Jan. 14, is the first of more than 500 people charged with federal crimes in the Capitol attack to be sentenced to time behind bars. He was sentenced to six months after pleading guilty to a misdemeanor charge, but gets credit for the time already served and will be released on Wednesday.

Curzio was arrested in Summerfield, Florida, for the Jan. 6 riot less than two years after he was released from a Florida prison in 2019 after serving an eight-year sentence for attempted murder. Court records from Florida show that he shot the boyfriend of his former girlfriend in a fight at her home.

Prosecutors pointed to his criminal record to keep him behind bars after his January arrest even though he faced only misdemeanor charges in the riot. Authorities wrote in court documents that Curzio was part of a violent white supremacist gang called the Unforgiven when he was behind bars in Florida and has tattoos with Nazi imagery.