Mayron Collier, a 24-year-old African American man, was shot in the head and killed inside a house on the 11900 block of South Yale Avenue in the West Pullman neighborhood of Chicago on January 29, 2015. He was pronounced dead at the scene at 3:30 a.m. by the Cook County medical examiner’s office. A 39-year-old man was also critically injured and taken to Advocate Christ Medical Center in Oak Lawn.

Police blocked off the area and searched nearby vacant homes for evidence. A person was being questioned in connection with the shooting, but no formal arrests had been made and the investigation was described as ongoing. The shooting left the community shocked and mourning and drew attention to gun violence in West Pullman.

If anyone has information about what happened at the house on South Yale Avenue that night, please share tips with the Chicago Police Department.