The 1912 Boyce-Sneed feud in West Texas began with a torrid sex scandal at the core of a love triangle, featuring Lena Snyder Sneed, the high-spirited, headstrong wife; Al Boyce, Jr., Lena’s reckless, romantic lover; and John Beal Sneed, Lena’s arrogant, grim, and vindictive husband, who responded to Lena’s plea for a divorce by having her locked up in an insane asylum on grounds of “moral insanity.” The chase was on after Al rescued Lena from the asylum and the lovers fled to Canada. That’s when the killings began. No one who knew the vengeful John Beal Sneed doubted for a moment that he would go after his wife’s lover with lethal intent. Frustrated by Al’s escape to Canada, Sneed assassinated Al’s aged and unarmed father, Colonel Albert ...