[Albion Wilde]

See if he delights in torturing animals, sets fires, wets his bed, etc.

I have never heard about bedwetting as an indicator of anything except certain allergies. One of the gentlest men I ever knew had been a bedwetter as a child; but as an adult was extremely genial and only took out his physical strength on tennis balls. Can you link or explain the tie-in to violence?

[boop]

It's a theory called the "Macdonald triad"

From Wikipedia:

The triad links cruelty to animals, obsession with fire setting, and persistent bedwetting past a certain age, to violent behaviors, particularly homicidal behavior and sexually predatory behavior.

I was being facetious in my comment.

This theory has been controversial, and I don't think it is universally accepted.