http://www.abc4.com/content/news/to...e-called-a-murder/2WwEi8YgTEq5l1y9XtxmZg.cspx OLYMPIA, Wash. (AP) - Authorities have been investigating the disappearance of Susan Powell as a murder for at least several months, while they publicly left open the possibility that the Utah mother might be found alive. A search warrant obtained by The Associated Press through a public records request Tuesday showed that police were investigating three felonies in Utah: first-degree murder, kidnapping and obstructing a public servant. Salt Lake County District Attorney Sim Gill acknowledged for the first time that they believe Powell is dead, saying in an AP interview that the case is being handled as a murder investigation. Gill wouldn't discuss the evidence, but said authorities don't have enough information to file charges in the case. "I think when I talk about it as a missing persons case, that's because we haven't located the body of Susan Powell," Gill said. "Do we think that she may have met harm? Sure. "I think that's been an ongoing assumption with law enforcement," he said, adding that the case remains "open and active."