The smiling face of Kristin Smart still looks out from a billboard in front of attorney James Murphy Jr.’s law office more than 25 years after the college freshman vanished from a campus on California's picturesque central coast. It once offered a $75,000 reward to help find the college student, but these days the billboard simply says: "Justice For Kristin," reports the AP. Smart is still missing, but Paul Flores, the man last seen with her at California Polytechnic State University in San Luis Obispo in 1996, is on trial more than a year after he was arrested on a murder charge along with his father, Ruben, who is accused of helping hide her body. What you need to know: