Last year's Seattle Public Schools financial scandal may have cost $1.3 million more than previously thought.

The Seattle Times reports that according to the state auditor's office, Silas Potter Jr. approved gross overpayments during the four years he headed a now-closed district office that was supposed to help small businesses win government contracts. The auditor says total misspending could approach $3 million.

In some cases, payments Potter approved appeared to be 10 times what they should have been, such as when the school district paid $14,500 for video surveillance cabling and conduit worth just over $1,000.

Potter faces first-degree theft charges, as do two others accused of conspiring with him.

The scandal prompted the firing of Superintendent Maria Goodloe-Johnson and the district's top financial officer. It also likely factored in the defeat of two school-board members last fall.