When 12 seals were shot and mutilated on Ireland's north shores in 2009, a commentator quipped that the perp had to be some kid honing his serial killer skills. Thanks largely to misconceptions and ...

For at least half a century, legend has told of a "triad" of ominous childhood behaviors: cruelty to animals, firesetting, and enuresis, said to predict future violence. The so-called "Macdonald triad ...