 Threat Management Units have been adopted by many city, county, state and federal law enforcement agencies, including agencies from Canada, Australia, the United Kingdom, Europe, Asia, Hong Kong and South America; as well as private security consultants all seeking to implement a form of TMU for contracted national and foreign jurisdictions.The Los Angeles Police Department Threat Management Unit was established in 1990.The primary mission of the LAPD TMU is to ensure the safety and well-being of members of the diverse communities of the City of Los Angeles by investigating and managing aggravated cases, both criminal and non-criminal, wherein individuals have demonstrated an abnormal fixation or obsession and have generated a long-term pattern of unsolicited acts of visitation, telephonic or written correspondence in a threatening manner toward a specific person.