A retired New York police officer was sentenced on Thursday to ten years in prison in Washington for his role in the January 6, 2021 Capitol attack, the longest sentence handed down to a rioter to date.

Thomas Webster, 56, attacked a police officer with a flagpole and ripped off the gas mask of an officer in charge of guarding the Capitol during the riots.

The scene, captured by a camera attached to the official’s body, showed the brutality of those moments and allowed a federal court jury in Washington to agree in May to Webster’s conviction.

Federal Judge Amit Mehta read out the verdict, and U.S. Department of Justice Attorney General Matthew Greaves said Webster “decided to poison the situation brutally.” “The referee holds him responsible for the repeated assaults on a police officer that day,” he added.

The former police officer, who also served in the Marine Corps, was arrested on February 21, 2021, and three months later, a jury found him guilty of five offenses, including assaulting two police officers with a dangerous weapon.

In the same statement, the Justice Department justifies the severity of the sentence with Thomas Webster’s previous position.

More than 860 people were arrested after the terrorist attack on January 06, 2021.