Ind. Code § 4-6-7-3
As compensation and for all their costs and expenses, the assistant or assistants shall receive a sum equal to not more than twenty-five percent (25%) of the money recovered and turned over to the state, to be fixed in the contract of employment. The state shall not be liable to the assistant or assistants for any other sum, either for compensation or costs. In case money recovered is paid into the state treasury without the percent having been first deducted, the auditor of state shall issue the auditor of state's warrant, upon a voucher approved by the attorney general, for a sum equal to not more than twenty-five percent (25%) of the money recovered and paid in; and there is appropriated out of the funds of the treasury not otherwise appropriated sums as may be necessary for this purpose.
IC 4-6-7-3