Elements of premeditation noted by the NYT:
https://www.nytimes.com/2018/12/07/us/james-fields-trial-charlottesville-verdict.html
"During the trial, prosecutors introduced evidence that Mr. Fields intended to commit harm when he drove from Ohio to attend the rally, which featured neo-Nazis bearing swastikas and Ku Klux Klan members. In a text message exchange with his mother before the rally, Mr. Fields was told to “be careful.” “We’re not the one who need to be careful,” he replied in a message that also included a photo of Adolf Hilter.
Prosecutors also showed the jury a cartoon that Mr. Fields had shared months earlier on Instagram of a car ramming into a crowd, with the words, “You have the right to protest but I’m late for work.” Other evidence included recordings of conversations that Mr. Fields had with his mother after his arrest, in which he described the counterprotesters at the rally as a “violent gang of terrorists,” and derided Ms. Heyer’s mother, Susan Bro, as an “anti-white liberal” who should be viewed as an enemy.
Video footage from that day showed Mr. Fields’s car idling, unmolested at an intersection, and even backing up out of the camera frame before it sped ahead into the crowd."