UAW president Shawn Fain is facing an investigation over claims that he mishandled bonuses at his fiancée's union-represented place of work.

A report found that Shawn Fain retaliated against a union official, Rich Boyer, after Boyer pushed back against some of Fain's actions.

The new probe concerns claims that Fain sought a financial bonus for his fiancée and pushed for a worker’s compensation claim for her sister.