District prosecutors have dropped charges against the man who had been accused in the murder of Chandra Levy, saying in light of new information it has concluded it can “no longer prove the murder case.” Prosecutors did not detail what that information is, saying only that it was received in the past week. The suspect, Ingmar Guandique, was set to go to trial in October. Levy was a 24-year-old intern with the Federal Bureau of Prisons when she disappeared May 1, 2001. The case gained national attention because police investigators at first looked closely at former California congressman Gary A. Condit, with whom Levy had an affair. Authorities later ruled him out as a suspect.