Help wanted: Child harrassed by hacker, FB account breached. What can we do to help?

hello brothers and sisters,
i have a query,
one of kid of around 13 years of age has been threatened by a facebook user who have been asking money and posting offensive contents in profile. this unknown person somehow got kids account password.

this is the one who has been using the kids account.
what might be the best solution.
kids family are not willing to go through police process.
i am confused but willing to help him.
thank you.