

James A. Fields of Ohio was named as the culprit. In addition to murder charges, Fields was also charged with malicious wounding and failing to stop at a deadly accident. From August 18th to December 11th, 2015, James was listed as an Active Duty Service Member in the United States Army.
Source: https://everipedia.org/wiki/james-alex-fields-jr/#ixzz4pbUJPdFp

“It was absolutely the most horrible thing I’ve ever witnessed. We ran to the scene and one of my friends actually tried to hold the wounds together for the woman who has passed away.” a witness told ABC News
Attorney General Jeff Sessions said that “the violence and deaths in Charlottesville strikes at the heart of American law and justice. When such actions arise from racial bigotry and hatred, they betray our core values and cannot be tolerated.”

President Donald Trump denounced the “egregious display of hatred, bigotry and violence on many sides,” but drew scrutiny from the media for not directly condemning the white supremacists.
Condolences to the family of the young woman killed today, and best regards to all of those injured, in Charlottesville, Virginia. So sad!
— Donald J. Trump (@realDonaldTrump) August 12, 2017