Every mass casualty incidents report published for Oak Forest, Illinois, newest first.
An entry in the Gun Violence Archive records four people wounded and no deaths in the 400 block of N Pine Ave in Chicago, Illinois, on Aug. 14, 2026; no official record available here confirms the account.
Chicago Police reported two dead inside Mark Twain Elementary School on Aug. 10; no students were in the building.
Chicago police said two adults were found unresponsive inside Mark Twain Elementary School on the afternoon of Aug. 10; no cause has been determined.
Police responding to reports of gunfire early on Friday, Sept. 23, found three of the victims outside a house in the Chicago suburb, according to The Associated Press.
Officers took a man into custody Monday evening, hours after six people were killed at the Independence Day parade, according to Yahoo News.
Police in the Illinois city say the suspected gunman remains at large and residents along the parade route have been told to shelter in place.