RIP young man. Condolences to his family. My parents both grew up near Potosi. People are very friendly, love the outdoors. Its a beautiful, historic area. In recent years, the economy hasn't been too good, not a lot of job opportunities.
It looks like Vienna, Mo was along the route he usually took when driving between Potosi and KU. I've made that drive from Kansas City numerous times. Very scenic, especially on those small roads south of Jefferson City.
The towns and cities around Potosi were originally settled back in the early 1700 ' s by French traders who came from Canada, across the Great Lakes, down the Mississippi . There are many people of French descent in the area, I wonder if Brandon is one.
Bless your heart son. Peace be with you.