MacDonald triad: cruelty to animals / obsession with fire-setting / persistent bedwetting past a certain age

https://en.wikipedia.org/wiki/Macdonald_triad

The Macdonald triad (also known as the triad of sociopathy or the homicidal triad) is a set of three factors that has been suggested if all three or any combination of two, are present together, to be predictive of or associated with later violent tendencies, particularly with relation to serial offenses.