DOJ launches probe of Louisville PD's use of force, search warrants By (0) U.S. Attorney General Merrick Garland announced the wide-ranging probe of the Louisville Metro Police Department at a Washington news conference Monday. Pool Photo by Mandel Ngan/UPI | License Photo April 26 (UPI) -- The Justice Department on Monday launched a wide-ranging "pattern or practice" investigation of Louisville's police department in the wake of last year's police shooting death of Breonna Taylor. The civil investigation into the Louisville-Jefferson County Metro Government and the Louisville Metro Police Department is to determine "whether LMPD engages in a pattern or practice of violations of the Constitution or federal law," Attorney General Merrick Garlandsaid at a news conference.