A very strange occurrence has taken place and ended with the death of another young life. The family of Chicago teenager Steven Rosenthal is demanding answers from Chicago police who say the teen killed himself after a brief chase. Police said the 15-year-old took his own life after a foot chase on Aug. 17. The Cook County Medical Examiner’s Office ruled the death a suicide, but the teen's relatives and friends are raising questions about what happened. According to Chicago police, officers saw Rosenthal near 15th Street and Keeler Avenue. Police said they suspected he had a gun and wanted to question him, but he ran away. After a foot chase, police said he shot and killed himself.