SACRAMENTO, Calif. -- An Arizona nonprofit has disclosed that two conservative groups were behind its $11 million campaign contribution to a California organization fighting Gov. Jerry Brown's tax initiative.
But the revelation shed little light on who provided the money since those groups don't have to report their contributors.
The California Fair Political Practices Commission termed the donation from Americans for Responsible Leadership the largest case of ``campaign money laundering'' in state history.
California Attorney General Kamala Harris said she would continue investigating to determine whether any laws were broken.
In a rare Sunday decision, the California Supreme Court unanimously ordered Americans for Responsible Leadership to disclose who was behind the donation. The group disclosed Monday that it received the money from two nonprofits with ties to billionaire brothers Charles and David H. Koch.