JOPLIN, MO.--- A former Joplin teacher pleads guilty to sexually exploiting an under age victim to produce child pornography. Charles Gastel, 40, admitted in federal court to sexually assaulting a teenage victim for nine years. He also admitted to video recording some of the assaults. According to a plea agreement, Gastel will be sentenced to 28 years in federal prison without parole. Following his prison term, he will spend the rest of his life under supervised release. Gastel was formerly a science teacher at South Middle School in Joplin.
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