M*CARBO Brotherhood

Castleberry custom smith wesson 38spl

I have a Model 10 frame / castleberry custom bull barrel / daves ramp sight / bobbed hammer / custome trigger / was used for 16 years by a member of the New Mexico Police as a match pistol / built around the late 60’s
Can anyone give me some history on the Gunsmith Castleberry who was a border patrol agent and shooter.
The gun was built by him