When a bear is defensive, predatory or habituated to human activity, it might not run off. In 2003, an Alaska brown bear famously attacked and killed Timothy Treadwell and Amie Huguenard at their camp in Katmai National Park. Treadwell had lived among the bears for 13 summers. Nevertheless, a bear was found feeding on the couple's remains, a gruesome reminder of the unpredictability of these creatures in the wild. "Horror stories like this make people reach for their guns and fire without thinking," says Tom Smith, a research wildlife ecologist who specializes in interactions between brown bears and humans. "Sterling Miller, an Alaska bear researcher, published a paper that showed there was a spike in defense- of-life-and-property killings following each well-publicized bear attack. Such incidents put people on edge and they respond to bears by shooting first and asking questions later."