An investigator with a national reputation for excellence, Steve Spingola has been on Kelly's team for the last few seasons. Now retired, Steve served as a Lieutenant Detective of the Milwaukee Police Department (MPD), supervising all major categories of criminal investigations, including stints in the Homicide Unit, Vice Control Division, Sensitive Crimes Unit, and Violent Crimes Division. He further served as the lead investigator for the Critical Incident Unit, a group that probes police related shootings, use-of-force incidents, and other significant events. As a detective, Steve spent several years conducting death investigations for a homicide unit with one of the highest clearance rates in the country. He was heavily involved in the high-profile case of serial killer Jeffrey Dahmer. He is also the author of Best of Spingola Files, Vol. 1, and Predators of the Parkway: a Former Homicide Detective Explores the Colonial Parkway Murders.