Policarpio Espinoza and his nephew, Adan Canela, both immigrants from Mexico, killed a 9-year-old brother and sister and their 10-year-old cousin at the family's Fallstaff apartment, beheading one child and nearly decapitating the other two. Neither police nor prosecutors identified a clear motive.
Five women were slain in a Northwest Baltimore house in December 1999 by a drug dealer who wanted to send a message to his rivals by killing female relatives. The mayor at the time called the slayings a "mass murder."
Nicholas W. Browning, 16, shot and killed his parents and two brothers as they slept in their Cockeysville home in 2008. He cited years of physical abuse and insults he said he had suffered at the hands of his father.
