Waving her friends goodbye as they dropped her off, Kristin Smart, 19, was excited about the night ahead.
It was 24 May 1996, a long weekend, and she was heading for a party at a nearby student house.
It was a hot evening, and dressed in black running shorts, a cropped T-shirt and red trainers, 6ft lin tall Kristin cut a striking figure.
In her first year at California Polytechnic State University, she was the only one of her friends who'd wanted to go, so had decided to head off alone.
Kristin had no purse, wallet or keys on her, so
