U.S. District Judge Phil Gilbert has granted Rick Jones's request to return to the Mayo Clinic in Minnesota for additional medical tests and treatment.
"His doctors have told him that further tests are necessary," wrote Jones's lawyer James Martin of Armstrong Teasdale in St. Louis in a motion filed April 20.
Jones, of Wood River, pleaded guilty to tax evasion in January. He admitted to dodging $1.2 million in 2003 taxes. He also admitted that he evaded a similar amount before and after 2003.
Jones plans to leave Illinois on April 28 to drive to Minnesota, and he anticipates returning on or about May 1, his petition states.
Gilbert, who granted the motion April 21, had previously granted Jones's request to travel to the Mayo Clinic for a stay through April 13.
Jones faces up to five years in prison, but can earn a shorter stretch if he cooperates "fully" with the government, his plea agreement states.
On sentencing day, he is required to pay restitution of $1,207,415.82 to BP Amoco North America, on top of a promise to pay $2.4 million in federal income taxes for 2002 through 2005.
In his plea agreement, he stipulated that his company, Triad Industries, received money from BP Amoco to clean up refinery pollution but spent it in other ways.
Jones posted $100,000 bond for release pending sentencing May 28. As part of his release, Jones is restricted to the southern District of Illinois unless otherwise ordered by the court.