Darrell Brooks, Aka MathBoi Fly on social media, flashes a gang sign in Facebook post.
There are also reports of gunshots being fired by police at the SUV.
Following the attack, the local police scanner captured the name of the suspect who left his ID in the vehicle.
Laura Loomer was first to report on this.
The suspect Darrell Brooks is a sex offender.
He has a long record.
The alleged Waukesha car attack suspect Darrell E. Brooks currently has two