Parties to champertous contract may be required to testify -- Immunity from prosecution

from prosecution. Persons in possession, or the person under whom the occupant holds the land, may compel the parties to any such champertous contract to testify on the trial, or to make discovery by answer to petition in equity. The person so compelled to give evidence or to make discovery shall not be subjected thereby to any penal or criminal prosecution for champerty and maintenance, and the evidence or discovery shall not be used in any such prosecution.