(Charlottesville, Va.) (AP) — Jurors in the trial of a man who drove into a crowd of counterprotesters at a white nationalist rally in Virginia heard from people in the crowd and a first-responder.

Marissa Martin testified Monday at the trial of James Alex Fields Jr. about joining a group of “happy people” marching in Charlottesville on Aug. 12, 2017. She described the scene turning to “complete chaos” as people were knocked to the ground.

Fire Captain Steward “Nick” Barrell described Heather Heyer’s injuries and said she had no chance of survival outside a hospital.

Two forensic science experts testified that Heyer died of blunt force injury to her torso and that blood samples collected from Fields’ Dodge Challenger matched Heyer’s DNA.

Fields, of Maumee, Ohio, is charged with first-degree murder and other crimes.

Prosecutors say Fields aimed at the group, killing Heyer and injuring dozens, but Fields’ lawyers say he was afraid for his life.