Law enforcement officials provide updates on an investigation into a driver that ran through a Waukesha, Wis., Christmas parade on Nov. 21, killing five and injuring more than 40 people. Read more: https://wapo.st/3DTOQEA. Subscribe to The Washington Post on YouTube: https://wapo.st/2QOdcqK Follow us: Twitter: https://twitter.com/washingtonpost Instagram: https://www.instagram.com/washingtonpost/ Facebook: https://www.facebook.com/washingtonpost/