Bill Frist disclosed that he went to animal shelters and pretended to adopt the cats, telling shelter personnel he intended to keep them as pets. Instead he used them to sharpen his surgical skills, killing them in the process.

James Dobson: When I returned I held up the belt and again told my angry dog to get into his bed. He stood his ground, so I gave him a firm swat across the rear end and he tried to bite the belt. The tiny dog and I had the most vicious fight ever staged between man and beast... I eventually got him to bed, but only because I outwieighed him 200 to 12.

Albert DeSalvo (the Boston Strangler) In his youth he trapped dogs and cats in orange crates and shot arrows through the boxes.

Jeffrey Dahmer staked cats to trees and decapitated dogs.

Henry Lee Lucas As a child, he killed every cat on his parent's farm.

David Berkowitz killed his neighbour's Labrador retriever.