Eduardo Sencion, the 32-year-old suspected gunman who killed four people in a senseless shooting at a Carson City IHOP , had a history of mental illness but no criminal record, according to a profile by AP. Sencion fought with police in 2000 when he was taken into protective custody for a mental health evaluation, but no charges were were ever filed. "He was a happy guy. He was always smiling," said a customer of the family-owned market where Sension worked. "He would help people out."
The three National Guard members killed were all in their 30s. One was an Afghanistan war veteran, father of four, and a fitness buff. Another was a veteran of the Iraq war and decorated officer, with an interest in military history. The third was an administrative sergeant, a "fireball" with a love of baking. The fourth person killed in the shooting was older, 67, and married to a retired Marine, who was also shot in the massacre. (Read more mass shootings stories.)