LAWRENCE, Kan. (AP) — A journalism professor suspended over a tweet that referenced the National Rifle Association after the Navy Yard shootings will not return to his University of Kansas classroom in 2013. Chancellor Bernadette Gray-Little announced Thursday that David Guth, who was placed on administrative leave September 20, would not teach the rest of this semester and would take a planned sabbatical in the spring. Teaching assignments for the fall of 2014 are not yet set. Guth posted the tweet after the September shootings killed 13 people in Washington, D.C. It said, "The blood is on the hands of the #NRA. Next time, let it be YOUR sons and daughters. Shame on you. May God damn you." Phone and email messages left with Guth seeking comment weren't immediately returned.