A college Halloween party in Illinois ends in tragedy when a mass shooting leaves a 19-year-old cheerleader dead and eight others wounded. In Oklahoma, a mother receives seven life sentences after her 11-year-old daughter gives birth to her stepfather's child in a home without running water. Finally, a missing Utah teenager is found safe in Oregon after more than 500 days, ending a nationwide search connected to online exploitation networks. Sydney Silvagni reports.