The man killed in a SWAT team raid last month had been under investigation by the Pima County Sheriff's Department for 20 months as part of a major drug and homicide investigation, Sheriff Clarence Dupnik said Tuesday during an editorial meeting with the Star. But details of the investigation into Jose Guerena's activities won't be released because an informant for the Sheriff's Department could be in danger, Dupnik said. "There's a chance that our informant is going to get killed," he said. Guerena was killed when SWAT officers fired 71 rounds from the front door of his home in the...