The single event with the most fatalities in recent years was due to a lone gunman . On December 5 , 2007 , 19-year-old Robert A. Hawkins , who had a history of drug abuse and social problems , opened fire at random with a Century WASR-10 semiautomatic rifle in the Von Maur store of the Westroads Mall . He shot a total of twelve people , killing eight , before committing suicide
opened fire at random
Westroads Mall shooting
Crime in Omaha, Nebraska