The body of slain Chicago police officer Samuel Jimenez at the shooting at the Mercy Hospital is being escorted to the Medical Examiner Office on November 19, 2018 in Chicago. - An argument in a hospital parking lot escalated into a shooting that killed three people, including a police officer, in the US city of Chicago on November 19, 2018. The violence only ended when police engaged in shootout with the gunman inside Mercy Hospital. "We have four deceased individuals: police officer, two female staff employees at the hospital, and the offender," police Superintendent Eddie Johnson told journalists. KAMIL KRZACZYNSKI/AFP/Getty Images)