According to court documents and Julian Khater's plea agreement, he and codefendant George Tanios — who pleaded guilty to lesser charges — traveled to Washington, D.C. from West Virginia to attend former President Donald Trump's rally at the White House Ellipse.

Bodycam and surveillance video reviewed by CBS News and pictures included in court documents show Sicknick reacting to an irritant, recoiling, and clearing the area to wipe his eyes and clean his face.

He "committed a cowardly and premeditated assault on at least three uniformed law enforcement officers," the government said during Friday's proceedings, showing the court video of Khater's various actions during the attack.

Describing their client as a gentle and kind individual who was swept up in the mob mentality of the day, Khater's defense team argued he and Tanios traveled to the nation's capital for the sole purpose of attending the Trump rally.

His defense team asked Hogan for a sentence of time served, citing in legal briefs what they described as suboptimal and dehumanizing conditions in custody which include poor food and sleep deprivation.

For his part, Tanios already pleaded guilty to lesser courts on illegal entry and disorderly conduct and was sentenced to time served with one year of supervised release.