JUNEAU -- Newly elected Mayor Greg Fisk died of natural causes Monday, and facial injuries that sparked rumors of an assault actually came from a fall, Juneau police said Wednesday. "The first assumption was someone had done something to him," said Bryce Johnson, Juneau police chief. An autopsy was conducted by the State Medical Examiner Office in Anchorage, Johnson told reporters at a press conference in Juneau Wednesday afternoon. Two Juneau detectives in Anchorage on other business attended the autopsy, he said. The cause of death has not been specified, but Fisk had a history of heart issues, Johnson said