According to a Chicago Tribune report, the disgraced ex-lawmaker has been assigned to the facility's minimum security camp, that houses approximately 332 inmates in a dormitory-style setting.
Jackson initially turned himself in Monday, but was sent away because of a paperwork snafu. His wife, Sandi, will begin her related 12-month term within 30 days of his release. The sentencing judge allowed them to serve at different times out of consideration for their young children who are 13 and 10.
Butner is located in the district represented by Rep. G.K. Butterfield, who picked up Jackson and his attorney from a "designated location" and accompanied his friend and former colleague as he turned himself in for the second time.
"I offered and he accepted and I'm glad that I did. It was good to be with him as he made that difficult step," Butterfield told BET.com. "He understands that he has made some terrible mistakes and is ready to pay the price for it."
The facility, the Tribune reports, has had in its custody a series of high-profile prisoners, including the Ponzi-scheming financier Bernard Madoff, currently serving time there, and the "blind Sheik" Omar Ahmad Rahman, who was convicted of plotting to blow up landmarks in New York City. Former Chicago police commander Jon Burge, accused of torturing African-American suspects to make false confessions, is another Butner inmate and Jackson's predecessor Mel Reynolds served time there for bank and campaign fraud.
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(Photo: AP Photo/Susan Walsh, File)