Mich. Comp. Laws § 445.783
If a witness has been or may be called to testify or provide other information at any proceeding relating to or under this act, the circuit court for the county in which the proceeding is or may be held may issue, upon application of the attorney general or a prosecuting attorney, with the permission of, or at the request of, the attorney general, which asserts that in his or her judgment the testimony or other information may be necessary to the public interest and the witness has or is likely to refuse to testify, an order requiring the witness to give testimony or provide other information which the witness refuses to give or provide on the basis of the privilege against self-incrimination, if the court provides in its order that the witness shall not be prosecuted or subjected to any penalty or forfeiture for, or on account of, any transaction, occurrence, matter, or thing to which the witness testifies or provides other information or evidence, documentary or otherwise, and that the testimony, information, or evidence shall not be used against the witness, in any criminal investigation, proceeding, or trial, except a prosecution for perjury for giving a false statement or for otherwise failing to comply with the order.
MCL 445.783