2010 Pennsylvania Code
Title 42 - JUDICIARY AND JUDICIAL PROCEDURE
Chapter 59 - Depositions and Witnesses
5965 - Exemption from arrest and service of process.

     § 5965.  Exemption from arrest and service of process.
        (a)  Incoming witnesses.--If a person comes into this
     Commonwealth in obedience to a summons directing him to attend
     and testify in this Commonwealth he shall not while in this
     Commonwealth pursuant to such summons be subject to arrest or
     the service of process, civil or criminal, in connection with
     matters which arose before his entrance into this Commonwealth
     under the summons.
        (b)  Witnesses in transit.--If a person passes through this
     Commonwealth while going to another state in obedience to a
     summons to attend and testify in that state, or while returning
     therefrom, he shall not while so passing through this
     Commonwealth be subject to arrest or the service of process,
     civil or criminal, in connection with matters which arose before
     his entrance into this Commonwealth under the summons.