The letter was sent to families Sept. 19 by the Diocese of Rockford.
In the letter, Bishop David Malloy writes the diocese was recently informed about a priest who is under investigation for alleged sexual misconduct with a minor, which reportedly happened at the time the priest served at Boylan, between 2012 and 2014.
No criminal charges have been filed against the priest at this time.
According to the letter, the diocese says the priest resigned from his assignment as parochial vicar at St. John Neumann in St. Charles.
He is also prohibited from engaging in ministry at St. John Neumann or any other parish, school or diocesan entity during the duration of the investigation.
The Diocese of Rockford says it will provide updates to families when it is able to do so.
It also encourages anyone who has been a victim of sexual abuse by an employee or member of the clergy of the diocese of Rockford to contact law enforcement and call the Diocese of Rockford’s hotline number at 815-293-7540.