In 2009 an elk hunter in Wyoming shot and killed a charging brown bear while trying to haul out a downed elk. After a long investigation the hunter, Glen Fortsch, has been cleared of any wrong doing.
The WCFCourier.com  has a story up about Glen and the nerve wracking wait to find out if he would be charged.
[Glen] shot the [brown bear] on Sept. 22, 2009, the day after grizzlies were added to the federal endangered species list. The status change could have been costly. Fortsch faced a fine of $25,000 and/or six months in prison instead of a lesser state penalty if his self-defense claim wasn't upheld.