Lack was chairman and CEO of Sony BMG Music Entertainment in 2004, when, according to former high-level Sony executives, the company discovered that a music executive named Charlie Walk had sent “sexual” messages via company email to female employees, including “graphic” pornography.

Soon after finding the messages, executives said, they repeatedly implored Lack to address Walk’s sexual harassment. Each time, Lack declined to act.

“I kept telling him: ‘You must do something about this. It’s imperative,’” one of the executives said. “Andy would turn a blind eye to making difficult decisions.”

An NBC spokesperson denied the allegation, and a spokesperson for Sony Music responded: “No comment.”