A top staffer at the progressive advocacy group Americans United for Change was fired from his post on Tuesday after he was caught on camera claiming the organization paid mentally ill people to instigate violence at campaign events for Donald Trump.

"Americans United for Change has always operated according to the highest ethical standards," AUC President Brad Woodhouse said in a statement obtained by Fox News. "Scott Foval is no longer associated with Americans United for Change."

Foval had served as AUC's national field director and was featured in a video released by James O'Keefe's Project Veritas on Monday. The 16-minute film featured undercover footage of Foval bragging about the alleged tactics AUC employed to stage disruptions at Trump rallies and cultivate a sense of "anarchy" surrounding the Republican presidentialof Foval's firing.

Foval, however, took a direct shot at O'Keefe on Twitter late Monday night, retweeting the following anonymous tweet: "Someday, [James O'Keefe] is going to fall so far down a rabbit hole, he's going to pull a sting on himself then blame 'liberal media' for it."

Monday's video was billed by Project Veritas as the first in a multi-part series aimed at exposing "the dark secrets at the highest levels of the DNC and Clinton presidential campaign." O'Keefe is expected to release a second video on Tuesday.