Following the Las Vegas Massacre, Dr. Faren Wintemute, the Director of UC Davis' Violence Prevention Center, has called on physicians across the nation to play a role in curbing gun violence. According to Wintemute, his colleagues should make a pledge to ask patients about firearms in the home and gun safety, as he detailed in the Annals of Internal Medicine Medical Journal. One thing Wintemute doesn't take into account? How truthful people are.