Police says 29-year-old Ryan Dolan had sexual encounters with a female student who is under 18. Bond was set at $250,000. He was out on bail Monday.
"I think it's very shocking, I have a student that goes there. It's kind of unnerving," said parent Randy Beck.
It's all people were talking about at Tinley Park High School Monday, the arrest of the wrestling coach and social studies teacher after he allegedly had sex with an underage female student.
"It's frustrating, disheartening," said Superintendent Bill Kendall, Bremen School District 228. "Our minds are on getting back to education and helping our student get back to being a successful member of our school district."
The complaint against Dolan states that the 29-year-old held a position of trust, authority or supervision over the teenager, identified only as Pat Doe.
Prosecutors say the encounter between teacher and student took place off school property. Speaking after court Monday afternoon, Kendall says they got a call from the police department Saturday morning informing them of the situation.
"We put our crisis team into place and our high school on high awareness," he said. "We've been in contact with the family and trying to be supportive of one of our students."
Dolan has been employed at the school for seven years.
Dolan resigned Tuesday, a day after being charged with two counts of felony criminal sexual assault, according to Bremen High School District 228.
Police also are investigating him regarding allegations of child pornography. Initially, Dolan had been suspended with pay after the district learned of the charges against him.
Conditions of Dolan's bail include having no contact with the victim or anyone else under 18 without a parent present and staying away from the high school.
Kendall said Dolan had a "clean record" and was respected by faculty and students.
The Sun-Times Media Wire contributed to this report.