Scott Walker and the Secret "John Doe" Investigation Explained (Updated)

Everything you need to know about the scandal embroiling Wisconsin's governor.

—By Andy Kroll  | Tue Feb. 7, 2012 3:00 AM PST

A dark cloud hangs over Wisconsin Gov. Scott Walker.

A "John Doe" investigation launched in May 2010 has embroiled former Walker staffers and appointees from his time as Milwaukee County executive, his job before winning the governorship in November 2010. The investigation, led by Milwaukee County District Attorney John Chisholm, has led to home raids targeting former staffers with close ties to Walker and numerous felony charges for election law violations, embezzlement, and misconduct in office.