Yolanda Evert has sued the federal government over the bear attack death of her husband, Erwin Evert, at Yellowstone National Park.
Erwin Evert was a botanist from Park Ridge. He spent part of every year at a cabin near the national park. In June 2010, Evert was hiking and came upon an angry bear. The 430-pound grizzly bear mauled the botanist to death, reports the Chicago Tribune.
So why would the national park be liable for his death?

