The name of the suspect has not been officially announced by police, but New York Post reporter Karol Markowicz (and others) have identified the suspect as career criminal, Darrell E. Brooks:
Darrell E. Brooks, black male, late 30s is the suspect in custody in Waukesha.
— Karol Markowicz (@karol) November 22, 2021
Via: New York Post:
A driver blew past police barricades and plowed into a group of people marching in a Christmas parade in Wisconsin on Sunday, killing five people and injuring dozens of others, including children, officials said.
The carnage unfolded at the annual celebration in the small city of Waukesha shortly after 4:40?p.m. local time and left more than 40 people injured, city officials said. At least 12 of the victims are children.
A person of interest was in custody and police have not ruled out terrorism as a motive, according to Police Chief Daniel Thompson.