I've ran across an instructor in Las Vegas who claims to teach a Korean style called Jung Sim Do. I can find little information about the art online. I would appreciate feedback from anyone who may have studied the system. The instructor that I spoke to claims to be the personal disciple of the Do Joo Nim of the system, Doug Vess. Again, I can find no record of Doug Vess anywhere online, except an obituary for a Grandmaster Doug Vess who was a 10th Dan in Shotokan (a far cry from a Hapkido-based system). Given the proliferation of frauds and charlatans in the martial arts, I would not be terribly suprised to find that very little of what this martial artist told me even remotely resembles the truth. Any feedback is appreciated.