Kristin Smart is shown in a file image. ARROYO GRANDE, Calif. - A search warrant was served Monday at the Arroyo Grande family home of Paul Flores, a former classmate of Kristin Smart, who, for the first time, was called the "prime suspect" in her 1996 disappearance.Shortly before 8 a.m., the San Luis Obispo County Sheriff's Office announced that they were serving a search warrant at the home of Ruben Flores, Paul's father, located in the 700 block of White Ct.