Former secretary of state Rex Tillerson was the guest speaker at Virginia Military Institute’s commencement Wednesday, and he took time during his speech to fire shots at his former boss as he spoke of the nation’s “growing crisis in ethics and integrity” and our leaders who “conceal the truth.”

Tillerson was the country’s top diplomat until March, when he was fired by Donald Trump and replaced by CIA director Mike Pompeo. NBC News reports that Tillerson called on the graduates to maintain a “fierce defense of the truth.”

Source: Rex Tillerson Takes Shots at Donald Trump During Virginia Military Institute Commencement Speech