If a person comes into this State in obedience to a summons directing the person to attend and testify in this State, the person may not while in this State pursuant to the summons be subject to arrest or the service of process, civil or criminal, in connection with matters that arose before the person's entrance into this State under the summons.
If a person passes through this State while going to another state in obedience to a summons to attend and testify in that state or while returning from that state, the person may not while so passing through this State be subject to arrest or the service of process, civil or criminal, in connection with matters that arose before the person's entrance into this State under the summons.