In-N-Out Burger's CEO, Lynsi Snyder, announced that four people were killed in a mass shooting at a newly opened restaurant in Twin Falls, Idaho, including 24-year-old Chad Williams, and seven others were injured in the attack. The restaurant had just opened a week earlier and was part of the California-based company's recent expansion to Idaho. The incident ended when an off-duty state trooper and an armed citizen, whose identities were not immediately disclosed, fired back and diverted the gunman from the restaurant. The FBI is urging the public to submit images and videos related to the shooting. The suspect's family is cooperating with law enforcement.