Chicago Embattled Mayor Rahm Emanuel greeted by '16 shots' chant about Laquan McDonald at Urban Prep event

Mayor Rahm Emanuel re-emerged publicly Wednesday, and the reception he got illustrates the challenge he faces governing the city day to day while responding to the still-developing fallout from the Laquan McDonald shooting and how his administration handled it.

The mayor spoke at what's normally a friendly venue for him, the Urban Prep campus in Englewood, a school he often cites as a success story for its high percentage of students who attend college. But after Emanuel made brief remarks, the principal prepared to lead the crowd reciting the school's creed when students instead started a chant of "16 shots!"

The chant has become a common refrain from protesters calling for Emanuel's ouster, a reference to the number of times white Chicago police Officer Jason Van Dyke shot African-American teen McDonald during an October 2014 encounter that prompted a Justice Department investigation of Police Department practices.

The outburst at Urban Prep lasted only about 10 seconds but is indicative of how widely anger over the McDonald shooting has spread.

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