`` There is no indication that Trayvon Martin was involved in any criminal activity . '' Martin would be alive if Zimmerman stayed in his vehicle , police said . The case has been a source of national debate since Martin's death. Evidence of THC , an ingredient in marijuana , was found in Martin 's blood , tests show . Firefighters find forehead `` abrasions '' and `` bleeding '' from Zimmerman 's nose .
Martin would be alive if Zimmerman stayed in his vehicle , police said . The case has been a source of national debate since Martin's death. Evidence of THC , an ingredient in marijuana , was found in Martin 's blood , tests show . Firefighters find forehead `` abrasions '' and `` bleeding '' from Zimmerman 's nose .