Black applicant protests lowering police entrance exam scoresCommunity leaders say Justice Department’s demand is ‘a slap in the face to black people.’DAYTON — Zachary Williams is a 21-year-old black Wayne High School grad who wants nothing more than to be a Dayton police officer or firefighter.He’s one of 225 black applicants who took the November police entrance exam now at the center of a dispute between the city and the U.S. Department of Justice. His test results are pending the Justice Department’s demand that the city lower its passing score for a police exam to allow for a larger pool...