As of Wednesday night, Forest Service investigators were staying mum about what might have caused the massive Rim Fire near Yosemite. (But it wasn’t a pot grow, okay?) On Thursday, they announced not only that they knew a hunter’s illegal fire had started the state’s fourth-largest recorded wildfire, but also that they knew who the hunter was. The Forest Service has filed no charges so far in the blaze that destroyed eleven homes and cost $81 million. They also haven’t sent him a bill, but a spokesman said, "There is a mechanism to do that."