Jinny,
I'm not privy to the webinars, and was not involved with this program, (Whew!) but I'm very interested in locating Kevin Clarke and unearthing any useful information about him and others similar to him - for those involved in this case in particular and for educational material to be used in future, similar cases.
Can you recall what Clarke looked like? If he had an accent? How he was dressed? If he said ANYTHING personal about himself? How old would you estimate him to be? What height/weight/hair color/eye color/any facial hair/etc.?
Is there a way to obtain a screen capture of the taped webinar for the time he was on camera?
If the person pictured in the webinar turns out not to be named "Kevin Clarke" ... they need to be identified/interviewed/investigated.
ST