Amanda Thomas spent last Christmas here, bringing her two young children for a holiday visit with her mother and two half-siblings. Two months later, Thomas, 27, was dead. On the morning of Feb. 28, she and a former high school friend with whom she'd reconnected the night before were found dead in Thomas' Hannibal, Mo., apartment. Police say Thomas and Carl Patrick Epley, 25, had been stabbed to death, allegedly by Manuel Cazares, Thomas' ex-boyfriend and father of her 20-month-old son. The boy and Thomas' 7-year-old daughter, who had a different father, were staying with relatives when their mother was...