The attorney general shall act as superintendent of the bureau and shall have the responsibility of and shall exercise absolute control and management of the bureau. The attorney general shall appoint and fix the salary of a chief of the bureau, such special agents, and such other employees as the attorney general deems necessary to carry out the provisions of this chapter within the limits of legislative appropriations therefor. The attorney general may appoint ad hoc special agents. Ad hoc special agents are law enforcement officers from other jurisdictions appointed for a specific law enforcement purpose and do not become full-time or part-time employees of the attorney general.