20 Years Later, the Mystery of Who Killed JonBenét Ramsey on the Day After Christmas Endures

Twenty years ago a 911 call reporting a missing and possibly kidnapped 6-year-old girl launched a murder mystery -- one that continues to endure, fascinate and perplex. In their Boulder, Colorado, home on the morning of Dec. 26, 1996, parents John and Patsy Ramsey found a ransom note handwritten on a pad with a black Sharpie that belonged to the family. It demanded $118,000 -- the exact amount of a bonus recently received by John -- for the return of JonBenét, the couple's blonde, child-pageant...