(MARION, IL) — A Chicago man was sentenced Thursday in federal court on a federal drug offense that happened in Williamson County. Acting U.S. Attorney James Porter says 36-year-old David T. Walls, who had previously pled guilty to an indictment charging conspiracy to distribute crack cocaine and heroin, was sentenced to 140 months in federal prison, to be followed by 8 years of supervised release, and fined $850. Evidence at the plea and sentencing hearings established that Walls was involved with others in the distribution of heroin and crack cocaine in Williamson County. Walls and others were transporting the drugs from northern Illinois for distribution in southern Illinois. At sentencing, the district court found that Walls was responsible for the distribution of more than 427 grams of heroin and 714 grams of crack cocaine. Walls received a sentencing enhancement because the group sometimes possessed firearms during the drug offense. The offense occurred between 2012 and October 2014.