James Alex Fields Jr.: Suspect in Va. White Nationalist Rally Car Incident

One dead after a day of violence at white nationalist rally in Charlottesville mayor says

WATCH: Car plows into crowd protesting white nationalists in Charlottesville

Authorities have identified the suspect who allegedly plowed through a crowd of pedestrians during a white nationalist protest in Charlottesville, Virginia, killing a woman, as James Alex Fields, Jr., according authorities.

James Alex Fields, Jr, a registered Republican, was booked in jail on suspicaion of second-degree murder, according to the Washington Post.

Cops say Fields killed a 32-year-old woman when he intentionally struck her with his silver Dodge Challenger. He's scheduled to be arraigned on Monday.

One person died and 19 were injured Saturday when a auto rammed a crowd of counterprotesters gathered to oppose a "Unite the Right" rally of white nationalist and other right-wing groups. Police released a mugshot late Saturday.

The driver was later arrested, authorities said.

Earlier this week, city officials had tried to "modify" the rally's permit to move the demonstration more than a mile away to McIntire Park, citing safety concerns associated with the number of people expected to attend the rally and counter protests. There were tensions between both sides even before the really began, and Virginia Governor Terry McAuliffe declared a state of emergency on Saturday. White nationalists, also known as the alt-right, are a deplorable collection of neo-Nazis, Ku Klux Klan members, white supremacists and other undesirables that love Donald Trump and promote white supremacy.

University of Virginia President Teresa A. Sullivan said law enforcement is investigating the "intolerable" violence displayed on the campus.

McAuliffe said that he spoke with Trump on Saturday and twice told him that "there has got to be a movement in this country to bring people together".

In May, a torch-wielding group that included prominent white nationalist Richard Spencer gathered around the statue for a nighttime protest, and in July, about 50 members of a North Carolina-based KKK group traveled there for a rally, where they were met by hundreds of counter-protesters.

Police broke up Friday's march, calling it "unlawful assembly".

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