Dr David Clarke has quite an interesting profile. It's not too difficult to see that his interest is serious but he's certainly not a ufologist. If you wish to delve deeper into this sort of thing I would recommend
Michael Shermer's book as a primer.
They were out in the middle of nowhere on a remote, private, 90,000-acre deer reserve at dusk, having driven 13 miles to get there. The camera was to capture a shot of they bagged a prize, but they allegedly got more than they bargained for.
Poachers don't take photos.
YS