Bail was set at $10,000 for Adam Domaradsky, who faces charges of impersonation and unauthorized access of a computer.
Old Tappan police tell The Record that Domaradsky somehow accessed the student's AOL and Facebook accounts and changed the passwords. The student learned of the intrusion after several classmates questioned the youth about their online conversations.
School officials say Domaradsky will no longer work in the district. And it's not known if any other students were victims.
A telephone number for Domaradsky could not be located Sunday. It was not known if he had retained a lawyer.
Information from: The Record