There´s been another case of dangerous vandalism at an Orange County park. A woman spotted a dozen razor blades this morning at Alicia Park in Mission Viejo. They were standing upright in the sand near swings and slides. Sheriff´s deputies used metal detector to sweep the park. In all, 20 blades were found. No injuries were reported. It´s the ninth time in two months that razor blades, nails or broken glass have been found at a south Orange County parks.