The letter, from the district’s Office of Student Protections and Title IX, also said investigators made no additional findings about possible violations of CPS policies or guidelines. It said the matter was closed and no further action would be taken. The letter is not the inspector general’s full report, which has not been made public and is expected to provide more detail about the determination.

The allegations had previously been deemed unsubstantiated, but the inspector general’s office reopened the investigation this month. The woman who made the allegations said she had not been interviewed in the earlier inquiry and came forward because she wanted to tell her story. She is now 26.

Dominguez’s attorney, Rima Kapitan, said in a statement on his campaign website that the inspector general’s report “fully cleared” him. Dominguez said voters deserved an answer after the allegations resurfaced and that he intends to refocus his campaign on education issues. He has also said the allegations were raised by Aida Flores, a former opponent in his 2019 City Council race; Flores is a CPS assistant principal and is described as having personal ties to the woman.

The woman’s lawyer and Flores did not immediately respond to requests for comment. The watchdog’s conclusion marks the end of its investigation, but the unreleased report means the public does not yet have the office’s full explanation of how it reached that determination.