Yesterday the New York Times and Washington Post published reports on the New Republic’s disintegrating credibility, and today it’s the Associated Press’s turn: New Republic Iraq stories questioned.

NEW YORK - A magazine gets a hot story straight from a soldier in Iraq and publishes his writing, complete with gory details, under a pseudonym. The stories are chilling: An Iraqi boy befriends American troops and later has his tongue cut out by insurgents. Soldiers mock a disfigured woman sitting near them in a dining hall. As a diversion, soldiers run over dogs with armored personnel carriers. Compelling stuff, and, according to the Army, not true.

Three articles by the soldier have run since January in The New Republic, a liberal magazine with a small circulation owned by Canadian company CanWest Corp. The stories, which ran under the name “Scott Thomas,” were called into question by The Weekly Standard, a conservative magazine with a small circulation owned by Rupert Murdoch’s News Corp. The Standard last month challenged bloggers to check the dispatches.

Since then, Pvt. Scott Thomas Beauchamp, of the 1st Battalion, 18th Infantry, has come forward as the author. The New Republic said that Beauchamp “came to its attention” through Elspeth Reeve, a reporter-researcher at the magazine he later married.

The Army said this week it had concluded an investigation of Beauchamp’s claims and found them false.

“During that investigation, all the soldiers from his unit refuted all claims that Pvt. Beauchamp made in his blog,” Sgt. 1st Class Robert Timmons, a spokesman in Baghdad for the 4th Brigade, 1st Infantry Division, based at Fort Riley, Kan., said in an e-mail interview.

The Weekly Standard said Beauchamp signed a sworn statement admitting all three articles were exaggerations and falsehoods.

The AP helpfully lists the various ethical violations in this scandal, according to the Poynter Institute’s Bob Steele:

Bob Steele, the Nelson Poynter Scholar for Journalism Values at The Poynter Institute school for journalists in St. Petersburg, Fla., said granting a writer anonymity “raises questions about authenticity and legitimacy.”

“Anonymity allows an individual to make accusations against others with impunity,” Steele said. “In this case, the anonymous diarist was accusing other soldiers of various levels of wrongdoing that were, at the least, moral failures, if not violations of military conduct. The anonymity further allows the writer to sidestep essential accountability that would exist, were he identified.”

Steele said he was troubled by the fact that the magazine did not catch the scene-shifting from Kuwait to Iraq of the incident Beauchamp described involving the disfigured woman. “If they were doing any kind of fact-checking, with multiple sources, that error — or potential deception — would have emerged,” Steele said.

He added that he was also troubled by the relationship between Beauchamp and Reeve, his wife, who works at The New Republic. “It raises the possible specter of competing loyalties, which could undermine the credibility of the journalism,” he said.

Meanwhile, at New Republic “blog” The Plank, they’re writing about everything else under the sun, and ignoring the meltdown all around them.

Calls to Editor Franklin Foer at The New Republic in Washington were not returned…