The U.S. Department of Justice will investigate the Portland Police Bureau's use of force patterns and practices. Assistant AG for the Department of Justice Civil Rights Division, Tom Perez says he's particularly interested in recent shootings involving people with mental illness. A number of local leaders, including Mayor Sam Adams, say they welcome the independent review. The review could take a year or longer. The Justice Department pledging to alert the City of problems and opportunities for improvement as they find them.