Idaho Code § 38-128
At the discretion of the director of the department of lands, it shall be the duty of the attorney general or the prosecuting attorney of the county within which such action lies, to prepare, upon information furnished by the director of the department of lands or the fire warden of any forest protective district, and foreclose all liens, other than those provided for in sections 38-111, 38-112 and 38-113, Idaho Code, and to prosecute in the name of the state of Idaho all actions for the recovery of penalties and costs and expenses incurred by the director of the department of lands, his deputy or fire warden of the district in carrying out the provisions of this chapter. For the purposes of this section, venue shall be determined subject to the terms of applicable Idaho law at the time of the incident. Civil actions against nonresidents of the state shall be prosecuted by the attorney general.
Whenever any arrest shall have been made for the violation of any provisions of this chapter, or whenever any evidence, which shows with reasonable certainty any such violation, shall have been lodged with him, the prosecuting attorney of the county in which the criminal act was committed must prosecute the offender with all diligence and energy.
Idaho Code § 38-128