An official report for the Chicago Police Department — ordered in the wake of the 2014 Laquan McDonald shooting — is available for public viewing. The task force that Mayor Rahm Emanuel established to look into police practices said the department must acknowledge its racist past and overhaul the way it handles excessive force allegations, as City Council members neared a final vote on Emanuel’s hand-picked choice for chief — an African-American with 27 years on the force.