Idaho state investigators said Friday they haven’t determined exactly how last summer’s Cape Horn fire near Bayview started, even though a woman camping near the fire’s origin had fired two marine flares earlier in the day, with one “dud” landing on the tinder-dry shoreline. After a year-long probe of the fire’s cause, the Idaho Department of Lands said the cause and person responsible for the human-caused blaze that destroyed nine homes and charred over 1,300 acres “has not yet been determined.”