[ by Howard Haykin ] The San Francisco office of Sidley Austin LLP introduced its new litigation partner, who is joining the white-collar, securities litigation and complex commercial litigation practice groups. Joshua Hill joined Sidley Austin after serving the past 4 years an assistant U.S. Attorney with the U.S. Attorney’s Office in the Northern District of California. As a federal prosecutor, Mr. Hill investigated and prosecuted a range of offenses, including wire and mail frauds, bank fraud, criminal tax, child exploitation, human trafficking, firearms and narcotics, and immigration crimes, the firm said. Hill "is a great addition to our litigation practice and continues our ongoing expansion in Northern California," Anne Rea, the member of Sidley’s Management Committee responsible for its West Coast offices, said in a statement. The white-collar practice group in Sidley’s SF office currently includes David Anderson, the former first assistant U.S. Attorney in the Northern District of California.  He joined in 2010.   Sidley Austin LLP has approximately 1,700 lawyers in 18 offices in the U.S., Europe and Asia.   [Bloomberg, 6/19/12]