Cambridge Police Sergeants James Crowley (L) and Leon Lashley stand together at a news conference with representatives of various police unions in Cambridge, Massachusetts July 24, 2009. Sergeant Lashley was on the scene last week when Sergeant Crowley arrested prominent black scholar and Harvard University professor Henry Louis Gates Jr. after responding to a call about a break-in at Gates' home in Cambridge. REUTERS/Brian Snyder (UNITED STATES CRIME LAW POLITICS)