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A suburban high school teacher has been charged with criminal sexual assault after allegedly having sex with a student.

29-year-old Ryan Dolan, a Tinley Park high history teacher, football, wrestling and softball coach was arrested Saturday and charged, police said.

In court papers it says Dolan had sex with one of his students last week.

In court today prosecutors say they may charge Dolan with additional sexual assault charges along with possessing child pornography.  His attorney told the judge up until now, Dolan has never had so much had a speeding ticket on his record.

The school district says the assault happened off school property.

Dolan was just released on bond Monday night.