§ 778. Failure to comply with terms of placement in authorized agency.
If a person is placed in the custody of a suitable institution in accord
with section seven hundred fifty-six and leaves the institution without
permission of the superintendent or person in charge and without
permission of the court, and if, after hearing, the court is satisfied
by competent proof that the respondent left the institution without just
cause, the court may revoke the order of placement and proceed to make
any order that might have been made at the time the order of placement
was made, or any order authorized under section seven hundred fifty-six.