Tensions persist at RP school January 31, 2004 By CECILIA M. VEGA THE PRESS DEMOCRAT Amanda Clarke, a bubbly 17-year-old who wears a heart-shaped stars-and-stripes pin on her Rancho Cotate High sweat shirt, giggles with one of her best friends about how they used to pass notes to each other in P.E. class. Oscar Gutierrez, a fellow junior who sports a sweat shirt with the colors of the Mexican flag emblazoned on the back, jokes about how he was always a soccer fan before Amanda introduced him to hockey. Lately, the pair hasn't had a lot to laugh about. She...