In Oklahoma a "Peace Officer" can request assistance from an adult, the adult then becomes an agent of the officer's department or agency for the action requested. Say in making an arrest of a person, or helping get the word out that there is a fire in the building.

I do not know the legal ramifications IF that person gets hurt, but in Oklahoma, once again there is the good samaritan law that allows an individual to assist others (like giving first-aid or cpr) with out worry of civil litigation if they injure a person while helping them.

Only the "Sherrif" could legally "Deputize" a person. Peace officers in Oklahoma can be Sherrif's, deputies, police officers, rangers, agents, special agents, etc....