After a Yellowstone National Park seasonal employee recently died after being attacked by a grizzly bear, some are rallying against a park decision to euthanize the bear.

On Friday, Lance Crosby, 63, of Billings was found dead a half-mile off the Elephant Back Loop trail near Lake Village on the northwest shore of Yellowstone Lake.

On Wednesday afternoon, an autopsy confirmed that Crosby hadn't died of any other medical condition, so it's likely he was killed by a bear, according to the Associated Press. An earlier National Park Service statement said wounds on Crosby’s arms appeared to be defensive.