An arrest warrant has been issued for a man suspected of calling in a bomb threat to La Jolla Country Day School, which shut down the campus in February.
The San Diego County District Attorney's office filed criminal charges against William John Cooper, 38, last week, including one felony county of threats to a public officer and four misdemeanor counts of telephone harssment.
A bomb threat shut down the school on Feb. 4, but a security sweep of the campus came up with nothing suspicious.
FBI officials later confirmed the threat was tied to dozens of harassing calls reported to San Diego Police. School administrators said the issue is a "personal matter between individuals not employed by the school."
La Jolla Country Day is a private, college preparatory school with about 1,200 students, ages 3 through grade 12.
