School officials are informing parents of a reported potential threat to student safety at a pair of Sonoma Valley schools. Sonoma Valley Schools Superintendent Socorro Shiels sent out a notice yesterday afternoon to families of students at Adele Harrison Middle School and Sonoma Valley High. Shiels says the threat originated from an online music video made by a former student in the school district. Police questioned the former student at his home and found there was no evidence of a credible threat. The video has since been taken down.