48 HOURS has obtained never-before-seen videotape shot by the terrorists who took 1,200 people hostage on Sept. 1, 2004 for three days at a school in Beslan, Russia. Roughly half of the hostages are believed to have been children. Correspondent Peter Van Sant speaks to the hostage negotiator, Ruslan Aushev, who is seen in the new video negotiating with the terrorists' leader. The footage also captures the dramatic moment when the terrorists let mothers leave captivity with their babies, some of whom were forced to leave their older children behind.

Texas multimillionaire Herb Vest is searching for who killed his father almost 60 years ago. Twenty-five-year-old Harold "Buddy" Vest was found hanging in his cabinet shop in June 1946 in the small town of Gainesville, Texas, and although the police ruled his death a suicide at the time, Herb always thought there was more to it. Now, he has launched his own investigation - hiring a team of experts to search for the truth. Vest receives a mysterious letter that claims that someone who was on the Gainesville police force was responsible for Buddy's death. Will Vest find his father's supposed killer?