Love Triangle Murder Involves Ex-NASA Worker GMA 1/17: South Carolina Debate Ganging Up On Romney; Love Triangle Murder; Zappos.com Hacked Cruise Disaster: Where Was the Captain? Captain reportedly ordered back to sinking ship after running. South Carolina Debate: Ganging Up on Romney The GOP front-runner's opponents try to derail his campaign in South Carolina. Zappos.com Hacked: 24 Million at Risk The online shoe retailer urges customers to change their passwords. Teacher: Mug Shots Released Police release images of the men they believe kidnapped Sherry Arnold. Police say Shannon Griffin snapped when she learned of her husband's affair. Love Triangle Murder: What Is Suspect's Defense? Dan Abrams discusses the woman accused of murdering her husband's mistress.