Witnesses and friends of the victims told The Gainesville Sun that suspects Tyler Tenbrink, William Fears and his brother Colton Fears drove up to a group of people walking toward a bus stop and carrying anti-Nazi signs around 5:20 p.m. local time, and asked whether they'd seen someone named "Kyle".
"This incident and how quickly it was handled displays the true teamwork that went into yesterday's Unified Command Centre activation", said Alachua County Sheriff Sadie Darnell.
Another bystander said they memorized the license plate number of the auto and shared it with police. Tenbrink is also charged with possession of a weapon by a convicted felon.
William Fears and Colton Fears remain at the county jail on a $1 million bond, and Tenbrink is held on a $3 million bond, according to jail records.
'I am amazed that immediately after being shot at, a victim had the forethought to get the vehicle's license number, ' Tobias said.
A group of officers called in stopped the vehicle and took the men into custody.
After officers read Tenbrink his Miranda rights, he admitted he was the shooter. "Us coming in and saying we're taking over your town, we're starting to push back, we're starting to want to intimidate back. It's always the left that brings the violence".More news: North Korea crisis: Tillerson says diplomacy will continue
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Prior to Spencer's event, Tenbrink told The Washington Post he came to Gainesville to show support for Spencer, who has advocated for a white ethno-state.
No one was injured in the shooting after the Gainesville speech, which drew hundreds of protesters and a smaller group of Spencer fans, along with a massive deployment of police trying to prevent a repeat of the street violence that marked a Spencer-related rally in Charlottesville, Virginia, in August, police said.
He appeared to have few supporters in the crowd.
Columbus attorney Michael Carpenter wrote that the decision was made after university officials conferred with law enforcement authorities and considered what had occurred during Spencer's speech on Thursday at the University of Florida campus in Gainesville.
Fears told the Sun that a man known for driving his auto into a crowd of people in the Charlottesville, Virginia, protests "wasn't unjustified".
The chants included "F**k you Spencer" and "Black Lives Matter".