HACKENSACK, N.J. (AP) — A New Jersey sex education teacher who is in prison for having sex with a student had his teaching certificate formally revoked.

Donald DeWitt pleaded guilty last year to endangering the welfare of a child at Bergen County Academies in Hackensack.

NJ.com reports (http://bit.ly/2uz9cib ) he was sentenced to four years in prison, and was fired from the school after he pleaded guilty.

The State Board of Examiners formally revoked DeWitt's teaching certificate on July 27. In a statement to the board, DeWitt said he was sorry for the dismay he had caused.

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Information from: NJ.com, http://www.nj.com