53 Pa. Stat. § 22237
In lieu of any existing authority the councils of any city of the second class shall have exclusive supervision of the official conduct of all city officers, and shall examine the grounds of all reasonable complaints made against any of them (with the exception of police officers), and shall cause all their violations and neglect of duty to be promptly punished or reported to the proper tribunal for correction; and for the purposes aforesaid they are hereby authorized to issue subpoenas, attested by the presidents and clerks of councils, under the seal of the city, for the attendance of such witnesses as they may deem necessary: Provided always, That nothing in this section shall be deemed in any way to interfere with the power of the law courts over city officers: And provided further, That any citizen sustaining damage by reason of the acts of any city official may institute proceedings in any of the law courts for redress of the injuries complained of.
53 P.S. § 22237