Indiana's shield law applies in "any legal proceedings or elsewhere." Ind. Code § 34-46-4-2. As stated above, the shield law applies to state matters only. Such limitation means that the shield law does not apply when a reporter is called before a federal grand jury.
There is no other source of privilege in a criminal case. The Indiana Supreme Court has rejected the notion that a qualified privilege exists under either the U.S. or state constitution in criminal cases. See In re WTHR-TV (State v. Cline), 693 N.E.2d 1 (Ind. 1998).