Traces of cocaine, marijuana found in Boston's blood By Len PasquarelliESPN.com Arizona Cardinals wide receiver David Boston will be charged with misdemeanor DUI, after a recent toxicology screen revealed traces of cocaine and marijuana in his system, a spokesman for the Phoenix Police Department told ESPN.com on Tuesday evening. A blood test was administered after an incident last month in which a citizen allegedly witnessed the Cardinals star driving erratically, followed him home, and phoned police. Sergeant Lauri Williams confirmed the results of the toxicology screen and said that the matter has been turned over to the city prosecutor's office....