A stepson says the man shot his mother , father and sister . The man was found dead at the scene of undetermined cause . The 14-year-old boy also said he attempted to wrestle the gun away from his stepfather , who told him he could leave if he stopped fighting . Aurora , Illinois , is about 20 miles south - southwest of Chicago .
A stepson says the man shot his mother , father and sister . The man was found dead at the scene of undetermined cause . Aurora , Illinois , is about 20 miles south - southwest of Chicago .