CHICAGO (AP) — Chicago police said they believe six family members found dead in their southwest side home were killed in a "targeted incident," though they're still trying to determine a possible motive. [...] the Cook County Medical Examiner's Office on Friday ruled their deaths homicides, saying five were stabbed to death and the sixth died of multiple gunshot wounds. Police have added extra patrols as a precaution, though Guglielmi on Friday repeated earlier police statements that they don't believe the general public is in danger. Authorities haven't released the identities of the victims, though the medical examiner's office described them as a middle-aged man and woman, an older man and woman, and two boys. Because we could have done something, or being so close I feel like maybe we would have noticed something. In the neighborhood, three teenage boys said they were worried about a classmate at Rachel Carson Elementary School who lived in the home.