Owens "Boomer" Castleman, singer-songwriter and guitarist, has died. http://www.thedailyb...omer-castleman/
Earliest days were in the formation of Lewis and Clarke Expedition (Under the pseudonym Boomer Clarke), here is Destination Unknown: https://youtu.be/bWdAo-vNtTw
Here also is his solo hit, Judy Mae: https://youtu.be/x4sD-gzHm5Q
Latterly became heavily involved the Nashville country music scene. I have a feeling he wrote for The Monkees, but enough research for now.
Edit: In fact it might be this one: https://youtu.be/sSYJDNSUkN8