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A prosecutor says it likely will take several days to determine if a man will be charged in the death of his estranged husband, a well-known Salt Lake City restaurateur and LGBT pioneer who died in a house fire.

Salt Lake County District Attorney Sim Gill said Tuesday that fires present unique challenges for investigators because large chunks of evidence can be destroyed.

Craig Crawford, 47, was arrested on suspicion of murder and arson after Sunday's blaze killed 72-year-old John Williams, the owner of the Market Street Grill. The fire occurred less than three weeks after Williams filed for divorce from Crawford and sought a restraining order.

Police say Crawford was in the Salt Lake City house when the fire started, but never called 911 to report the blaze. Crawford was being held at the Salt Lake County jail in lieu of $1 million bail.