Overview

• Fussner, 28, was armed with a semi-automatic rifle and fired at a dining facility with 200 people inside.
• The incident began when a woman reported being held at gunpoint by Fussner, who threatened mass shootings outside the park.
• More than 20 law enforcement rangers were involved in locating and confronting Fussner.
• One ranger was injured during the shootout but has since been released from the hospital.
• The FBI is leading the investigation, with support from the National Park Service and other agencies.