Police are working to investigate a shooting on a CTA train in the Chicago Loop that left one person dead and another injured. The victims are a 23-year-old man and a 44-year-old man, who were on a CTA train at Washington and Wells when they got into an argument with an unknown man who eventually shot them and fled the scene.⁠ ⁠ #chicago #chicagoloop #cta #transportation #crime