The Governor may appoint and employ, subject to the provisions of the Merit System, such inspectors or secret service men or such other persons as he may deem necessary for the purpose of detecting and reporting upon violations of the prohibition laws, or any of them, and contract with them for reasonable compensation to be paid by the state for their services. He may also offer a reward to all sheriffs, constables or other persons, in his discretion, who will bring about the conviction of any person for the violation of said laws and particularly for the violation of the laws against the manufacture of prohibited liquors, and may state the amount that will be paid out of the State Treasury to any officer or person who may secure the conviction of anyone guilty of the offense of illicit distilling or other violation of said laws. In the event such reward or rewards are earned, the same shall be paid by warrant drawn by the Comptroller upon the State Treasury or the law-enforcement fund therein provided by this chapter, as the Governor decides, upon a bill presented against the state for the reward, stating the facts and circumstances which the claimant puts forward as entitling him to the reward, when the said bill is certified and approved as being correct by the Attorney General of the state and is also approved by the Governor.