I don’t believe that tumors are inheritable as you seem to do.
????
Not sure where you got that.
For all I know, tumors or proclivities to cancer could be heritable, but in any case that's not what I said. I pointed out that there was never a definitive finding that a tumor had caused the younger Mr. Whitman's criminal rage; and I said his life and family background seem to offer a sufficient explanation all by themselves.
Conceivably, the medical and personal-history causes could both be involved. The question is whether there's a logical reason to "go there"--beyond the fact that the Kinky Friedman song goes, "There was a rumor about a tumor . . ."
The conditions for an autopsy weren't good, since the body had been embalmed. There was first a finding that the tumor had been irrelevant to his behavior, and later a finding that it might have been relevant after all.