A report by a civil liberties group has found that Los Angeles police officers are more likely to stop and search black and Hispanic residents than they are whites, even though whites are more often found carrying guns and contraband. The report — authored by Yale Law School professor Ian Ayres ’81 LAW ’86 and published Monday by the American Civil Liberties Union of Southern California — analyzed the Los Angeles Police Department’s own accounts of pedestrian and motor vehicle stops in the year from July 2003 to June 2004. Police Chief William Bratton said he disagrees strongly with the report’s findings and interpretation.