Technically, a missing person is defined as any individual, of any age, who is missing and is under any proven physical or mental disability, or who is missing under circumstances indicating that his/her physical safety is in danger, or under circumstances indicating the disappearance is not voluntary, or after a catastrophe. In the case of minor children: abducted by a non-custodial parent, or lost. Generally, In order to report a missing person, you must appear in person at the police station, complete a detailed description of the missing person, and indicate why you believe the person should be considered missing in the context of the above definition.