The Chicago Public Schools is suspending the $20.5 million contract with SUPES Academy, a Wilmette company that provides training for school principals.

The federal government is investigating the role CPS CEO Barbara Byrd-Bennett may have had in the no-bid contract with SUPES Academy, as she was a previous employee of the company. Byrd-Bennett took a leave of absence last week, and Chicago Board of Education member Jesse Ruiz was named interim schools chief of the CPS district.

In a letter Ruiz sent Wednesday to SUPES, the interim CPS CEO gave the company a 30-day notice of the contract suspension.

Also on Wednesday, CPS issued a request for proposals for an independent review of the contracting process in the school district.