There is insufficient evidence to file charges related to the Dec. 11 event, although University of California police will continue to investigate who was responsible for the estimated $18,000 in damage to windows, light fixtures and large planter urns in front of the house. It was unclear who the vandals were in the crowd of as many as 70 people who peacefully protested recent UC fee hikes, said Teresa Drenick, a spokeswoman for the district attorney's office. If UC police turn up new evidence, some or all of the original eight people arrested and others could be charged, Drenick said. 'And it is possible nobody will get charged,' she added. The eight included two UC Berkeley students and two UC Davis students. The students still could face potential UC discipline pending the outcome of a campus judicial review, UC officials said. 