11 Pa. Stat. § 27
It shall be lawful for any society duly incorporated, having for one of its objects the protection of children from cruelty, or the placing of children not otherwise provided for in families, to receive into its care and guardianship, at its discretion, minors committed to such care and guardianship by any justice of the peace, magistrate or judge of any court, upon complaint and due proof made, first, that such minor, by reason of incorrigible, unmanageable, vicious or wayward conduct, is beyond the control of the parent or guardian of such infant, or, second, that the parents of such minor, by reason of vagrancy, incorrigible or vicious conduct, criminal offense, moral depravity or cruelty, are unfit to have the training and control of such minor, or, third, that the said minor is a vagrant and has no parent or guardian capable or willing to restrain, manage or take proper care of such minor, or the said society may receive under its care and guardianship any minor as aforesaid, when such minor has been committed to its care and guardianship by the judge of any court, after said minor shall have been duly convicted of any criminal offense.
11 P.S. § 27