My wife and I are members of our county Sheriff's Posse. Our regular duties are to assist the Sheriff with non LE type activities. We are normally called out to assist when searching for lost people or to assist in the event of natural disasters such as floods or tornadoes. All of us have had 1st responder and first aid training and we are often asked to help provide backup at local concerts, the air show, and other events. We disperse in the crowds with radios and are usually the 1st person on the scene when someone is in distress.
There aren't a lot of counties that do this and we get a lot of requests to help in other counties and even states. We get a lot of practice and often are asked to help try to locate a missing body, or evidence of a crime by other agencies. I've traveled as far south as Miami and as far north as Kokomo with searches in AL, SC, NC, TN as well as all over GA.
Under "normal" circumstances we are not armed and have no arrest powers, but the Sheriff give us those powers if he wishes. In an emergency we could be deputized and paired with a paid deputy to assist them and increase manpower. But we're not just any Joe off the street. All of us have to be fingerprinted and go through the same background check each year as the paid deputies.
I certainly hope it never comes to that. I singed up for the SAR and lifesaving side of it. But if things get bad enough that we're needed would do my part. If its that bad I'd rather be working with LE than not.