WHO: The Internal Revenue Service

WHAT: A government investigator said nearly 50,000 prison inmates claimed more than $130 million in tax refunds this year without providing any wage information to the IRS.

HOW: A report by the U.S. Treasury Department’s inspector general for tax administration stops short of saying the refunds were fraudulently claimed. It does, however, say the IRS should investigate further. The report is the latest in a series of audits looking at prison inmates claiming tax credits and other government payments.