Overview

• Shortly before 8 p.m. Wednesday, a 42-year-old man was stabbed during an argument aboard a CTA Blue Line train in the 5800 block of North River Road near Rosemont.
• The victim suffered a puncture wound to his left thigh and was pronounced dead after being transported to Lutheran General Hospital in Park Ridge.
• Responding officers took a male suspect into custody at the scene, and prosecutors have not yet announced formal charges.
• Chicago police detectives have launched a full investigation into the circumstances surrounding the fatal attack.
• This incident is the latest in a series of violent episodes on CTA trains, following multiple shootings and stabbings on both the Blue and Red Lines since last September.