An anti-fascist activist who died during a neo-Nazi rally in Virginia has had to have her final remains hidden after her mother, Susan Bro, 61, continues to receive threats from white nationalists.

Heather Heyer, 32, died while counter-protesting at a rally organized by white supremacists in Charlottesville, Virginia, on Aug. 12.

Bro and other members of Heyer's family have continuously received threats from racist extremists since news of Heyer's views against racism and hate were made public knowledge, Bro told the Daily Beast.

'It’s a symptom of hate in society that you should have to protect your child’s grave, for Pete’s sake,' Bro said. 'So, I’m protecting my child now.'

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Heather Heyer (R in photo), 32, who died protesting a neo-Nazi rally in Virginia, has had to have her final remains hidden after her mother, Susan Bro, 61, continues to receive threats from white nationalists

Heyer was killed after being struck by a car that was driven into a crowd in Charlottesville, where white nationalists had organized a rally around protests of the removal of a statue of a Confederate Army General.

Bro said her ashes have been interred in an undisclosed, unmarked location in order to protect the workers on site and family members while they visit her remains.

James Fields, 20, from Ohio, is accused of driving the vehicle that killed Heyer and injured dozens of others.

He has been charged with first degree murder, upgraded on Thursday from his initial charge of second-degree murder by District Judge Robert Downer, the Richmond-Times Dispatch reported.

James Fields (R), 20, from Ohio, is accused of driving the vehicle that killed Heyer (L)

Fields is accused of driving his 2010 Dodge Challenger towards a crowd of protesters, then stopping, reverse, and speeding in the direction of the group of people

The difference in the charges could mean a difference between a possible life sentence for first-degree murder, and what could have been a sentence of 20-40 years in custody with the second-degree murder charge, if Fields is found guilty.

The video of Fields allegedly drive the vehicle that stuck Heyer was shown when he was informed of his increase in charges.

The video shows a man driving his 2010 Dodge Challenger towards a crowd of protesters, then stop, reverse, and then with the newly-created room to accelerate, speed in the direction of the group of people, of which Heyer was a part.

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Following the violence in Charlottesville, President Donald Trump did not initially condemn the white supremacists involved in the demonstration, but instead said there was wrongdoing on 'many sides.'

When the Daily Beast asked Bro if she felt Trump was at all to blame for her daughter's death, she said:

'I’m starting to come to that conclusion because he definitely pushes forward a hateful agenda.

'There are family members that will possibly not have anything to do with me for saying so. Many family members are strong Trump supporters, and continue to be so despite everything they see.'

Bro is now running the Heather Heyer Foundation , still in its early stages of development, out of a small office at the Miller Law firm, where Heyer (pictured) used to work

Bro is now running the Heather Heyer Foundation, still in its early stages of development, out of a small office at the Miller Law firm, where Heyer used to work.

The organization's mission is to support the next generation of social-justice leaders.

'As long as I’m doing something proactive, I can control the feelings, the emotions, a little better,' Bro said.

Judge Downer previously certified felony charges against three other participants in the Charlottesville rally, according to the Richmond-Times.

Those men are Richard Preston, 52, from Baltimore, who was captured on camera firing a gun at the rally, and Alex Jamos and Jacob Goodwin, who are charged in the battery of DeAndre Harris.

Fields' and the other men's charges will be brought before a grand jury on Monday, at which point trial dates are expected to be set.