In this chapter, "missing adult" means any person:
I. Who is 18 years of age or older;
II. Whose residence is in New Hampshire or is believed to be in New Hampshire;
III. Who has been reported to a law enforcement agency as missing; and
IV. Who falls within one of the following categories:
(a) The person is under proven physical or mental disability, thereby subjecting himself or herself or others to personal and immediate danger;
(b) The circumstances indicate that the person's physical safety may be in danger;
(c) The circumstances indicate that the person's disappearance may not have been voluntary; or
(d) The person is missing after a catastrophe.