That’s a first, guilty cuz of family members: Ronald Reagan’s son Ron is crazy, Hugh Rodham—heck, Hillary’s husband!, Jimmy Carter’s brother, Obama’s father was a Muslim, etc. etc. Where does it end?
All of the above are in the range of “normal”
An animal-torturing son (while a Boy Scout, not adult, mind you) means something happened (or failed to happen — e.g., proper instruction and guidance) in the home.
Pure speculation, but typically when a child torture animals, the animals are a “sacrifice” (so to speak) for displaced anger -— i.e., the animal bears the brunt of rage against some other person (or the boy himself) that the boy cannot or will not express.