On February 5, 2001, a mass shooting occurred at a Navistar engine plant in Melrose Park, Illinois, when former employee William Daniel Baker entered the facility and fatally shot four employees and wounded four others with an SKS rifle before turning the gun on himself. At the time, Baker was involved in a criminal case involving a conspiracy to steal machinery from Navistar. He had been convicted of crimes related to the plot months before the shooting and was due to turn himself into custody on February 6.