The exact circumstances surrounding the incident and what may have motivated it were not yet clear.
A person of interest was taken into custody, Waukesha Police Chief Daniel Thompson said at a news conference Sunday evening. Senior law enforcement officials told NBC News that a person of interest who may have a significant criminal history was being questioned overnight.
Investigators are probing the possibility that whoever was behind the wheel had been involved in an earlier incident involving a knife fight and was fleeing just prior to the vehicle reaching the parade, around 4:30 p.m., they said.
An FBI spokesperson said that the bureau was aware of the event but that local authorities would lead the inquiry.
http://www.nbcnews.com/news/crime-courts/20-injured-suv-drives-wisconsin-holiday-parade-route-rcna6292?cid=eml_nbn_20211122&user_email=d60e03639eee858a9d1f722503050fb5c4c275d9e0d473a7e1f6182e26eccb3c
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