Family, friends and community members attend a vigil Sunday, Feb. 17, 2019, in Aurora, Illinois. (AP Photo / Nam Y. Huh)

Authorities have released the audio of 911 calls reporting the Feb. 15 shooting at the Henry Pratt Co. facility that resulted in five deaths.

Law enforcement personnel gather near the scene of a shooting at an industrial park in Aurora, Illinois, on Friday, Feb. 15, 2019. (Bev Horne / Daily Herald via AP)

Police have identified the gunman who killed five people at a suburban Chicago business and shot and wounded five police officers.