The Hinsdale Township High School District 86 Board of Education voted unanimously Monday night to move forward with its crackdown on students attending Hinsdale Central and Hinsdale South despite not living within the district's borders.

The vote authorized the hiring of American Heritage Protective Services, Inc., to investigate 131 current students who are suspected of living outside of the district and help the district implement an improved residency-check system in advance of January's 2014-15 registration. The board approved $27,500 worth of American Heritages service, with the option of approving more next month if need be.

"With course registration upon us, we are aggressively moving forward to ensure that the tallies we use to determine the number of teachers we need for the 2014-15 school year are based on students who verifiably live in the district's attendance area," a memo from superintendent Bruce Law to board members reads. "To fulfill this obligation to taxpayers, we have checked addresses in our student information system against databases, which resulted in discrepancies requiring further investigation." Law wrote in the memo that, with the assistance of American Heritage, the next steps will be: