JANESVILLE — Janesville School District officials will seek to fire an employee arrested Friday on a charge of repeated sexual assault of a student.

Janesville police arrested Aaron O'Reilly, 44, of 122 Dakota Drive, Edgerton. O'Reilly has been a special education teacher at Edison Middle School since June 2000. He has been on paid leave since April 26.

“We are deeply disheartened to learn that an educator in our schools is accused of these crimes,” said Superintendent Karen Schulte said at a Friday press conference. “As a community, we expect a lot from our educators and school staff, and we place an enormous amount of trust in them that they will do their best to care for and teach all of our children.”

Deputy Chief John Olsen said an officer from the Edgerton Police Department contacted Janesville police. The officer had spoken to O'Reilly, who told the officer he was a “teacher at Edison Middle School and had a sexual relationship with a student,” Olson said.

It is unclear how O'Reilly came into contact with the Edgerton officer to discuss the matter.

Janesville detectives investigated and confirmed the sexual relationship occurred, Olsen said.

O'Reilly was put on paid leave the same day officials learned of the investigation. When O'Reilly was put on leave, his access to district buildings, computer networks, computer files and email was immediately locked, Schulte said.

Olsen said the sexual relationship began approximately two years ago and lasted 18 months. The assaults occurred at Edison, O'Reilly's home and the student's home, Olsen said.

Olsen encouraged anyone with additional information to contact Janesville police.

“I would just like to say that our thoughts and concerns are with the victim and their family,” Olsen said.

Rock County Assistant District Attorney Rich Sullivan said a criminal complaint against O'Reilly would be filed Monday during O'Reilly's initial court appearance. Sullivan declined to answer questions about the age and gender of the victim, whether the victim was a student of O'Reilly's or whether O'Reilly has been cooperating with the investigation.

“No charging decisions have been made yet,” Sullivan said.

“I want to inform everyone that we are very concerned with the safety of the victim,” Sullivan said. “If there is anyone who has any information concerning the charges of this case, we certainly would encourage you to contact the Janesville Police Department. Any information you have will be very helpful.”

Schulte said the school district was sending notes home with students about the arrest.

“We take this matter very seriously, and we are deeply disheartened that it appears something of this nature and this seriousness has happened at one of our schools and to one of our students,” Schulte said.

“As you can imagine, I have a lot of questions myself,” she said.

O'Reilly was being held at Rock County Jail pending his first court appearance Monday.

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