They can pull everything from the phone, data, call information, and the call itself.
That sounds a lot like a wiretap, which is commonly referred to as Title III from Title III of the 1968 crime bill that covers wiretaps. There comes a part where due diligence before using such a device should be expected. Buying a new gizmo and not considering existing law should be treated harshly by both the courts and the authorities responsible for employing these people.