Guy Reffitt, 49, a member of the group "Three Percenters", was found guilty in March, in particular of obstructing the work of Congress and the police, after the first trial devoted to this attack.
At the head of the first group to attack the headquarters of Congress, he had helped to force the police lines, equipped according to the prosecutors with a handgun, a bulletproof vest, a helmet and plastic handcuffs.
After receiving gassy gas, he retreated as hundreds of Donald Trump supporters sowed violence and chaos inside the Capitol, delaying certification of Joe Biden's presidential victory.
"I didn't come in, but I helped start the fire," the Texas-born oil industry employee then boasted in a video.
On his return to Wylie, near Dallas, he had threatened his two children to prevent them from reporting him to the police. “Traitors, we kill them,” he said in a recorded conversation transmitted to the FBI by his 19-year-old son, Jackson.
During the trial, the prosecution relied on numerous videos showing him, in the front row, haranguing the crowd and calling him a "leader".
Judging that his actions fall under federal laws on "terrorism", the prosecutors then demanded a severe sentence of fifteen years in prison.
His lawyers pleaded for two years in prison, pointing out that he had not entered the Capitol and had not committed violence.
Judge Dabney Friedrich retained an intermediate sentence of seven years and three months in prison. She called his actions "the antithesis of democracy" but refused to stray too far from the sentences handed down so far, the heaviest being five years and three months in prison.
Since the attack, more than 850 people have been arrested, 330 have pleaded guilty and only about ten have been tried at trial. So far, around 100 prison sentences have been handed down.
In parallel with this judicial component, a parliamentary commission of inquiry is seeking to shed light on the role of former President Donald Trump in the attack. Its report is expected in the fall.