Illinois’ child-welfare agency and state police helped pay for ousted Gov. Rod Blagojevich’s research on impeachment under his policy of charging his office’s legal costs to other departments, the state auditor said Tuesday.

Out of $7.2 million worth of legal work for Blagojevich, his office paid less than $22,000, according to a report by Auditor General William Holland. The rest was charged to an array of state agencies that had no apparent connection to the legal services.