Identifying police in fatal shootings can be a contentious issue between police unions and city administrations. Practices for going public with officers' identities vary nationwide, with departments releasing names within one or two days in some high-profile cases and holding them back in others. In one recent police shooting that garnered national attention — the killing of Philando Castile in Minnesota in July — officials released the identity of the officer who fired about 24 hours after the shooting.