Most school shooters are disturbed students - that’s why news the gunman at the University of Nevada campus in Vegas was a 67-year-old professor came as a shock. He fatally shot three faculty members before being killed by cops. Now the social media posts he left behind are giving us insight into his mind - including his fixation on a notorious serial killer. And it's a story that broke hearts across the country - a bride fatally mowed down by an alleged drunk driver on her wedding day. However, as Ann Mercogliano reports, instead of being bonded by grief - the groom and his mother in law are locked in a bitter legal feud. Plus, things got heated at last night's Republican debate as the presidential candidates got personal. But was Chris Christie really targeted with a fat joke? And we're learning more about the final moments of TV legend Norman Lear from his son-in law. He says the family gathered together and sang iconic theme songs from Lear’s hit shows - and one in particular got the tears flowing.