A federal judge has postponed the sentencing of former state Rep. Joe Armstrong for felony tax evasion until January.

Armstrong was scheduled for sentencing on Nov. 30. A federal jury found the long-time East Knoxville Democrat guilty of filing a false and fraudulent tax return in August. The felony conviction carries a sentence of up to three years in prison and a $250,000 fine.

An assistant U.S. attorney says the prosecution will seek prison time for the former lawmaker.

Armstrong is due in court for a hearing Dec. 12. His sentencing is now scheduled for Jan. 25.

Armstrong officially retired from his seat in the legislature about a month after his conviction. He held the seat for more than 25 years.

A spokesperson for the Tennessee Department of Treasury told WBIR 10News last week that Armstrong will keep his pension despite the conviction.