Police says 29-year-old Ryan Dolan had sexual encounters with a female student who is under 18.
Bond was set at $250,000, but for now Dolan remains in jail and while he is still officially employed at Tinley Park High School, officials say he will not be going back.
"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."
Charged with one count of criminal sexual assault, the complaint against Dolan states that the 29-year-old, who was arrested Friday, 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's bail was set at $250,000 and prosecutors say additional charges against him might still be filed.
"We have not received an official resignation at this point but he will not be coming back on campus," Kendall said.
Dolan has been employed at the school for seven years. He is currently suspended with pay. To be officially fired, the school board must make the decision and their next meeting is March 18.