In this subdivision: I. "Caregiver" means any individual duly designated as a caregiver for a person who needs care assistance as a vulnerable adult. A caregiver includes, but is not limited to, a relative, paid caregiving professional, partner, friend, or neighbor who has a significant relationship with the person. II. "Department" means the department of safety. III. "Missing vulnerable adult" includes, but is not limited to, a missing adult who: (a)(1) Is 18 years or older; (2) Whose whereabouts are unknown; (3) Whose last known whereabouts at the time he or she is reported missing is in New Hampshire; and (4) Whose disappearance poses a credible threat to the safety and health of the person, as determined by a local law enforcement agency; and (b)(1) Who has a mental or cognitive disability, such as dementia; (2) Who has an intellectual or developmental disability; (3) Who has a brain injury; or (4) Who has another physical, mental, or emotional disability.