sentences:  In practice, according to federal sentencing data, three-fourths of the 198 defendants found guilty of obstruction of justice in 2006 served jail time.The average length of jail time on this charge alone was 70 months.On June 5, 2007, Judge Walton sentenced Libby to 30 months in prison and fined him $250,000, clarifying that Libby would begin his sentence immediately.