For sure, Rompola was the type person most people would consider a "weird" guy.
I mean, how many people only work as hard as they can for 6 months each year, so they can then spend the next 6 months totally dedicated to hunting mature bucks, with a bow, on public land?
Some of us don't find this that weird, hey?
Initially, he may have felt insulted by the X-ray request.
Later, I suspect the X-ray issue became a part of his "contract" in that if he allowed the skull to be X-rayed, he would be liable for paying back the money many believe he was paid just to keep all this a mystery.
I do believe we will one day find out more about why and how the story was suppressed. My personal thinking is it was a free-range wild mature buck, as he had several others with similar antler characteristics (indicating the same local area lineage). It's certainly possible he was in violation of some game law technicality, such as hunting from an elevated position, either knowingly or unknowingly at the time of kill, but such could have been further reason he just shut up & disappeared.