Trouble for Arizona Attorney General Tom Horne, according to the Arizona Capitol Times:

Federal authorities are investigating Attorney General Tom Horne over allegations that he illegally collaborated with an independent expenditure committee that spent more than a half-million dollars on negative ads against his Democratic opponent in 2010, the Arizona Capitol Times has learned.

A complaint filed in February by a former political ally and prosecutor in Horne’s own office, alleges that the attorney general collaborated with an independent expenditure called Business Leaders for Arizona, which received $115,000 from Horne’s brother-in-law in California.

The complaint, filed with the Arizona Secretary of State’s Office, also alleges that Horne rewarded the chairwoman of the campaign group with a high-paying job at the Attorney General’s Office.