Papa John’s Pizza’s Chairman John Schnatter resigned as chairman of the board yesterday. Earlier in the day, he acknowledged using a racial slur during a May conference call and apologized following a media report that also said the pizza chain founder had graphically described violence against minorities.

“News reports attributing the use of inappropriate and hurtful language to me during a media-training session regarding race are true,” Schnatter said in a statement released Wednesday by the company. “Regardless of the context, I apologize. Simply stated, racism has no place in our society,” Schnatter’s statement said.

The media-training company working with Papa John’s opted to end its business relationship with the pizza company after the call, according to Forbes. The publication reported the objectionable behavior took place on a conference call intended as a role-playing exercise for Schnatter on avoiding racially charged mishaps in the future.

Papa John’s initially declined to confirm or deny the report, but said in an emailed statement that the company “condemns racism and any insensitive language, no matter the situation or setting.”

The controversy comes only seven months after Schnatter relinquished his CEO role after criticizing National Football League players for kneeling during the national anthem, blaming the outcry surrounding their protests for slowing sales growth at Papa John’s, at the time an NFL sponsor and advertiser.

On the May call, Schnatter reportedly said the N-word while complaining a legendary fast-food chain founder had used the word in the past without being subjected to public backlash. He also reflected on his childhood in Indiana, saying people used to drag African-Americans behind trucks until they died, according to Forbes.

Shares of Papa John’s Pizza fell nearly 6 percent after the report, and ended the day yesterday trading down 4.8 percent.

The Forbes report prompted protests from the Louisville NAACP, which said Schnatter should either step down or be removed from the University of Louisville’s board of trustees by the city’s NAACP.