Washington Post columnist Ruth Marcus resigned Monday after accusing the paper’s CEO and publisher of killing her column criticizing owner Jeff Bezos’ latest editorial edict.

Marcus, an associate editor and columnist with The Post’s opinion section, is leaving the paper where she’s been employed since 1984.

“We’re grateful for Ruth’s significant contributions to The Washington Post over the past 40 years,” a spokesperson for The Washington Post said in a statement to NBC News. “We respect her decision to leave and wish her the best.”

In a resignation letter to Bezos and CEO William Lewis, Marcus said “independent judgement” is no longer in play at The Post opinion section and new editorial policies will “break the trust of readers that columnists are writing what they believe, and not what the owners has deemed acceptable.”

Bezos, the Amazon founder who purchased the venerable publication in 2013, told the staff last month