 On September 1, 1994, the offices of Moncrief Oil were raided by the IRS, who seized more than one million documents.Moncrief was accused of owing the United States government between $100 million and $300 million.Following a two-year investigation, Moncrief pleaded "no contest" to one count of criminal tax fraud; this charge alleged that he had "improperly deducted" $900,000 in business expenses from his company Montex Drilling on his 1990 personal federal tax return.