The conviction of former New York Police Department veteran Thomas Webster is the latest in a series of guilty verdicts from the Capitol Riot on Jan. 6.

The Department of Justice has won all four of the jury trials involving the attack, which injured more than 100 police officers. Over 250 of the rioters have pleaded guilty, mostly to misdemeanor charges.

Webster, 56, who served for 20 years with the NYPD, tried to argue that he was using self-defense against the officer he assaulted with a metal flag pole on Jan. 6. The jury rejected his self-defense assertion.

Webster was charged with assault, resisting or impeding an officer using a dangerous weapon, civil disorder, entering and remaining on restricted grounds with a dangerous weapon, disorderly and disruptive conduct on restricted grounds with a dangerous weapon, engaging in physical violence on restricted grounds with a dangerous weapon, and engaging in an act of physical violence on Capitol grounds.

He was found guilty on all six charges. The assault charge carries a sentence of 20 years in prison. Webster's sentencing is scheduled for Sept. 2.

The Department of Justice has charged more than 780 people with federal crimes and 160 have been sentenced.

U.S. Capitol riot police officers stand guard during a rally in support of defendants being prosecuted in the January 6 attack on the Capitol, in Washington, U.S., September 18, 2021.
U.S. Capitol riot police officers stand guard during a rally in support of defendants being prosecuted in the January 6 attack on the Capitol, in Washington, U.S., September 18, 2021. Reuters / JIM BOURG