ORS § 496.710
In any action or proceeding for the enforcement of any of the provisions of the wildlife laws, or in any investigation before a grand jury, district attorney or other officer, or any criminal proceeding, no person shall be excused from testifying concerning any offense committed by another or by the person on the ground that the testimony of the person may incriminate the person. However, such testimony shall not be used against the person in any prosecution for any crime or misdemeanor under the laws of the state, nor shall the person be subject to any criminal prosecution or any penalty or forfeiture for or on account of any transaction, matter or thing concerning which the person has been compelled to testify or to produce evidence, documentary or otherwise.
ORS 496.710