 Association was established between Mark Twitchell, of Edmonton, Alberta, Canada, during his first-degree murder trial, and the character of Dexter Morgan.After weeks of testimony and gruesome evidence presented in court, Twitchell was found guilty of the planned and deliberate murder of 38-year-old Johnny Altinger on April 12, 2011.British teenager Steven Miles, 17, was sentenced to 25 years in prison on October 2, 2014, for stabbing and dismembering his girlfriend Elizabeth Rose Thomas, 17, in Oxted, Surrey.