He was sentenced to 90 years in prison, and has to serve at least 32. This has nothing to do with media spin etc.
One last thing: you're confusing federal and state court. He was charged in both:
Hours after pleading guilty in federal court, Davis appeared in state court and pleaded guilty to five counts of conspiracy and 13 counts of fraud against the government. Hinds County Circuit Judge Adrienne Wooten gave Davis a 90-year sentence with 58 of those suspended and 32 to serve. She put him on house arrest until his federal sentencing.