Vegas officer, wife and son dead in murder-suicide - Article Photos 1/7

Officials put on protective masks before entering a house as they investigate a shooting and fire in Boulder City, Nev., Monday, Jan. 21, 2013. Las Vegas police spokeswoman Carla Alston confirmed that a Las Vegas police officer was involved in the 9 a.m. Monday incident. She says Henderson police are handling the investigation. (AP Photo/Las Vegas Sun, Steve Marcus)