Officer James Koumoundouros, while working security at a Chicago bank in the 6200 block of North Lincoln Avenue, observed an armed assailant walk in. The gunman immediately pointed his weapon at Officer Koumoundouros. While discreetly pushing the alarm button, Officer Koumoundouros calmly talked to the gunman. He drew his revolver and shot the robber. However, the gunman returned fire, mortally wounding Officer Koumoundouros.

He was survived by his wife and four children.