OLD LYME, Conn. – A Connecticut 15-year-old faces computer crime charges after he allegedly hacked a teacher’s email account and sent out inappropriate district-wide emails.

Connecticut State Police arrested an unnamed student at Old Lyme High School on Monday for fifth-degree computer crimes and second-degree harassment and breach of peace over three email messages sent from a teacher’s account on Sept. 7, the Norwich Bulletin reports.

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Police refused to divulge the contents of the messages, but superintendent Ian Nevaiser told WTNH the messages got progressively cruder and officials shut down the district’s email system soon after they were sent.

District officials shut down the system to prevent students and others from reading the messages, but some students did see the emails and alerted their parents.

Holly Cox, parent of an 11-year-old student, said her child couldn’t bring himself to repeat the sexually explicit communications.

“He had read all the emails, and he said, ‘Mom, they were just so inappropriate.’ I said, ‘What did they say?’ He said, ‘I can’t say it, mom. I can’t say it,’” Cox told NBC Connecticut. “According to my son, a lot of kids never got to read them because the email system was locked down before they got a chance, but unfortunately he did.”

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Jeanine Jones’ 12-year-old and 15-year-old children also received and read the messages, she said.

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“My children were old enough, and I could talk to them,” Jones said. “But I’m sure a lot of other parents were extremely shocked and upset.”

“Somebody thought it was a funny joke, but it wasn’t. And it also went to some children who were too young to be exposed to the language that was in the email,” she said.

District officials sent a notice to parents hours after the breach that “someone accessed the e-mail account of one of our high school teachers and sent three highly inappropriate messages to our entire school community.”

The message assured parents that “Our technology staff is on campus and is working through the night to stop the flow of emails and track the origin of the sender.”

State Police used search warrants to access the district’s email accounts and track down the student, The Lymes Patch reports.