Websdale began to gather centuries of data from familicides all over the country, research that culminated in his 2010 book, Familicidal Hearts, in which he identifies two primary types of family killer: livid coercive, or those with long histories of domestic violence, and civil reputable, in which perpetrators are respectable members of society—like William Beadle—with no obvious histories of violence and who kill out of a warped sense of altruism.
