There is more truth about American journalism in the film “Kill the Messenger,” which chronicles the mainstream media’s discrediting of the work of the investigative journalist Gary Webb, than there is in the movie “All the President’s Men,” which celebrates the exploits of the reporters who uncovered the Watergate scandal.

The mass media blindly support the ideology of corporate capitalism. They laud and promote the myth of American democracy—even as we are stripped of civil liberties and money replaces the vote. They pay deference to the leaders on Wall Street and in Washington, no matter how perfidious their crimes. They slavishly venerate the military and law enforcement in the name of patriotism. They select the specialists and experts, almost always drawn from the centers of power, to interpret reality and explain policy. They usually rely on press releases, written by corporations, for their news. And they fill most of their news holes with celebrity gossip, lifestyle stories, sports and trivia. The role of the mass media is to entertain or to parrot official propaganda to the masses. The corporations, which own the press, hire journalists willing to be courtiers to the elites, and they promote them as celebrities. These journalistic courtiers, who can earn millions of dollars, are invited into the inner circles of power. They are, as John Ralston Saul writes, hedonists of power.

When Webb, writing in a 1996 series in the San Jose Mercury News, exposed the Central Intelligence Agency’s complicity in smuggling tons of cocaine for sale into the United States to fund the CIA-backed Contra rebels in Nicaragua, the press turned him into a journalistic leper. And over the generations there is a long list of journalistic lepers, from Ida B. Wells to I.F. Stone to Julian Assange.

The attacks against Webb have been renewed in publications such as The Washington Post since the release of the film earlier this month. These attacks are an act of self-justification. They are an attempt by the mass media to mask the collaboration between themselves and the power elite. The mass media, like the rest of the liberal establishment, seek to wrap themselves in the moral veneer of the fearless pursuit of truth and justice. But to maintain this myth they have to destroy the credibility of journalists such as Webb and Assange who shine a light on the sinister and murderous inner workings of empire, who care more about truth than news.

The country’s major news outlets—including my old employer The New York Times, which wrote that there was “scant proof” of Webb’s contention—functioned as guard dogs for the CIA. Soon after the 1996 exposé appeared, The Washington Post devoted nearly two full pages to attacking Webb’s assertions. The Los Angeles Times ran three separate articles that slammed Webb and his story. It was a seedy, disgusting and shameful chapter in American journalism. But it was hardly unique. Alexander Cockburn and Jeffrey St. Clair, in the 2004 article “How the Press and the CIA Killed Gary Webb’s Career,” detailed the dynamics of the nationwide smear campaign.

Webb’s newspaper, after printing a mea culpa about the series, cast him out. He was unable to work again as an investigative journalist and, fearful of losing his house, he committed suicide in 2004. We know, in part because of a Senate investigation led by then-Sen. John Kerry, that Webb was right. But truth was never the issue for those who opposed the journalist. Webb exposed the CIA as a bunch of gunrunning, drug-smuggling thugs. He exposed the mass media, which depend on official sources for most of their news and are therefore hostage to those sources, as craven handmaidens of power. He had crossed the line. And he paid for it.

If the CIA was funneling hundreds of millions of dollars in drugs into inner-city neighborhoods to fund an illegal war in Nicaragua, what did that say about the legitimacy of the vast covert organization? What did it tell us about the so-called war on drugs? What did it tell us about the government’s callousness and indifference to the poor, especially poor people of color at the height of the crack epidemic? What did it say about rogue military operations carried out beyond public scrutiny?

These were questions the power elites, and their courtiers in the press, were determined to silence.