Have investigators trying to solve the murder of those four University of Idaho students hit a roadblock? That's what many fear as the police department posts a blanket request for the public's help. It comes as new bodycam video surfaces of one of the victims. Steven Fabian has details. And the nightmare after Christmas continues - Southwest canceled thousands more flights today but it's not only people stranded; mountains of luggage are also piling up. That's why many travelers are singing this woman's praises… she's being called the “Lost Luggage Angel”. Sibila Vargas tells us why. Plus, the epidemic of smash-and-grab robberies at retail stores has dramatically increased this holiday season. Frustrated business owners are going to great lengths to both deter criminals and stay safe. As Jim Moret reports, some stores are even making sure their workers have panic buttons. And how many times have you heard Mariah Carey's “All I Want For Christmas Is You” this season? Probably too many to count! It’s become a Christmas classic, but it's also at the center of a war of words over who wrote the tune. Now Mariah is making her case with a flashback video.