JUNEAU -- A major figure in an Alaska political corruption scandal is expected to complete his prison sentence next week.

Federal Bureau of Prisons records show Bill Allen, who was convicted of bribery and related tax charges, is scheduled for release Tuesday. He has been at a halfway house in New Mexico.

Allen was the government's star witness in the trials of then-U.S. Sen. Ted Stevens and state representatives Pete Kott and Vic Kohring. All three had convictions tossed for prosecutorial errors. Kott and Kohring, who won new trials, recently entered plea deals with prosecutors and were sentenced to time served.

Their charges stemmed from maneuverings surrounding a 2006 oil tax vote in the state Legislature. In their plea agreements, they acknowledged accepting money from Allen, then-CEO of an oilfield services company.