Sleepy, something similiar happened to my family before.
Some guy kept asking everyone in my family (grandparents, uncles, aunts, dad, mom, brothers etc etc) for info about one of my uncles.
A very rude and annoying man. Called everyday..left messages.. bothered me and my father when we were at work. Somehow got our cell numbers and called us at very bad times.
To this day, I still don't know what he as up to... And no, my uncle (the one being asked about) was not in the military or apply for any clearances..