Chicago police have released a photograph of the weapon used in the Highland Park mass shooting on 4 July, where seven people were killed and dozens injured. On Monday evening, police arrested 22-year-old Robert “Bobby” Crimo after an hours-long manhunt around the city north of Chicago. A spokesperson for the Lake County Major Crime Task Force said the suspect used a rifle “similar to an AR-15” from atop a commercial building and fired into a crowd that had gathered for the parade in Highland Park. On Wednesday night, the police released a photograph of the weapon, reported News Nation.