Jalen Sims was a 20-year-old Black man shot dead during an argument inside a Chatham home on the evening of Sunday, June 25, 2023. The residence was in the 400 block of East 88th Place. During the confrontation another male produced a firearm and shot Sims, who suffered gunshot wounds to the head and abdomen. Emergency responders took him to the University of Chicago Medical Center, where he died; the Cook County medical examiner later confirmed his identity.

Chicago police opened a homicide investigation. Based on initial reports from June 2023, no arrests had been announced and authorities had not publicly identified a suspect; the case remains unsolved. If anyone was in or near the 400 block of East 88th Place on the evening of June 25 and saw or heard anything, please come forward with information.