A former state legislator will spend four years in prison on charges of commiting mail and wire fraud and filing a false tax return. A federal judge sentenced Michael A. Fox in Cincinnati on Monday. Fox pleaded guilty to the charges in a deal with prosecutors. The conspiracy charge involved payment of nearly $500,000 that prosecutors said Fox received for helping an attorney get a $1 million telecommunications contract with Butler County. Fox was a commissioner there after spending more than 20 years in the Ohio House.