As an nationally-recognized educator, Detective Campbell (Ret.) has been providing training for over 30 years. He has numerous advanced certifications and has worked broadly in investigative units dedicated to complex investigations, include Homicide and examining de-escalation tactics. With his expansive knowledge in areas related to Interviewing, Hostage Negotiation, and Crisis Intervention Training, he currently serves as the CEO for CallBox Training, providing services across various different industries.