‘We’re seeing an explosion:’ Sheriff Tom Dart, state Sen. Jacqueline Collins take aim at ghost guns, propose legislation to ban the untraceable weapons

In this video screenshot from an Oct. 14, 2021, news conference, Lt. Gary Contreras with the Cook County sheriff’s office shows the parts of a ghost gun, the frame, barrel and slide, that can be purchased separately and would then be put together by someone. (Shanzeh Ahmad / Chicago Tribune)