Page 6 of A Good Girl's Guide to Murder

If they are vulnerable because of their age or a disability, that would be high-risk. If the behaviour is out of character, then it is likely an indicator that they have been exposed to harm, so that would be high-risk.

Pip:

Um, so, if the missing person is seventeen years old and it is deemed out of character for her to go missing, would this be considered a high-risk case?

Angela:

Oh, absolutely, if a minor is involved.

Pip:

So how would the police respond to a high-risk case?