Hal, the coyote who mysteriously entered Manhattan recently and was captured after leading police—as well as news helicopters–on a wild chase around Central Park, is dead. Authorities say the animal was already suffering from a serious case of heartworms and the ill-effects of eating a rat or mouse full of rodenticide. But in the end, they said, it was the stress of being held and tagged that killed Hal only moments before he was to be released back into the wild. State Department of Environmental Conservation officials say they will reevaluate the way the handle, tag, and release coyotes.