People can go missing for a number of reasons. It might be a simple case of forgetting where they are expected to be, a misunderstanding or being distracted by someone. But they may also be running away from home, friends or work – often to avoid family problems, mental health issues or to escape an abusive relationship. They could also be targeted by exploitation and grooming, and can even disappear without anyone knowing what has happened (see five reasons why people go missing).
Anyone whose whereabouts cannot be established can be considered as missing and must be treated as such until found and their safety is confirmed. Missing person cases are often complex, particularly those involving young adults, people with disabilities and other vulnerable groups.
When a missing person report is made, police will usually enter information about the person in the National Crime Information Center database. This is a powerful tool that allows law enforcement, medical examiners and others to share information on cases throughout the country. It is also a key resource for those searching for loved ones who are reported as missing.
For those who are looking for a missing person, it is important to keep in contact with those who know them well and have been in regular contact. This includes family, friends and colleagues who have had recent contact with them. It is also a good idea to check places that the person regularly visits such as shops, restaurants and transport services.