(CNN) The Dodge Challenger crept up, reversed, then accelerated toward the crowd. As he watched a surveillance video of that moment -- the car barreling toward people protesting a white nationalist rally in Charlottesville, Virginia last summer -- Marcus Martin grew angry and cursed out loud.

"Take me out," Martin yelled during a hearing in Charlottesville on Thursday for James Alex Fields Jr., the man who prosecutors say drove the Challenger. Martin, who was injured as he pushed his fiancée out of the car's path, stormed out the courtroom.

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Fields, who initially was charged with second-degree murder and other offenses, now faces a charge of first-degree murder. A Charlottesville district court Judge announced the upgraded charge at the court hearing attended by Fields and about two dozen of Heyer's family members and supporters.

Prosecutors played the surveillance video from a Charlottesville restaurant in addition to a video from a Virginia State Police helicopter monitoring the events.

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