A third person - this time an adult - has been charged in last month's horrific murder of teenager Alex Arellano. The Sun-Times reports this morning that Alisa Campos, 22, has been charged with a count of first-degree murder. Two others - Jovanny Martinez,15, and Edgar Silva,18 - were previously charged in the crime. According to a report from Chicago Breaking News, Campos is alleged to have been one of the people who beat Arellano with a baseball bat when he refused to acknowledge his attackers' gang affiliation (Latin Kings). Arellano's burned body was found in a gangway the next day. more ›