( CNN ) -- Police in the metropolitan Chicago village of Robbins , Illinois , said they are investigating an incident in which a man is believed to have shot and killed his wife and two of her children before also dying . A third child told Robbins police that his stepfather shot his mother , brother and sister . The suspect , Michael Worsham , was found dead in the home where the shootings took place late Sunday . Police said the cause of death was undetermined . The three others all suffered gunshot wounds , according to police . 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 . The teen then grabbed his 5-year-old nephew and ran to a friend 's house . Robbins is in Cook County , about 20 miles south-southwest of downtown Chicago . Florida community reels after mom kills son , daughter , self . Man kills wife and son with crossbow , then slits throat .
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 .