One of several officers announced their office before opening the basement door and entered but were met with gunfire as Jones fired two shots from a .40-caliber handgun, Groebner said. Jones then fired multiple shots at the approaching officers, who retreated and returned fire, though no one was struck. Chicago police's SWAT unit staged a barricade incident at the scene. Jones allegedly threatened to shoot police officers, but later surrendered. Only Jones was in the basement and the whereabouts of the second man wasn't clear.