One of the top aides to Mayor Bill de Blasio's wife will not face disciplinary action for not disclosing certain information in her background check.

Rachel Noerdlinger, chief-of-staff to first lady Chirlane McCray, was being investigated after she failed to mention her live-in boyfriend Hassaun McFarlan, a convicted killer who has reportedly blasted police on social media, calling them "pigs."

Noerdlinger has also had brushes with the law. The Daily News reports that in 2010, she was arrested on misdemeanor assault charges after an argument with McFarlan's ex.

A probe by the Department of Information did not elaborate on its findings, but it did not recommend disciplinary action.

The mayor's office issued a statement in support of Noerdlinger, saying "she's not going anywhere."