Professors Angelo Codevilla of Boston University and Bruce Lawrence of Duke University point out that the early, verifiable videotapes of bin Laden do not match the tapes that have emerged since 2002 and even one in late 2001.
Telltale distinguishing features include a changed facial structure and increasing secularism in the content of the messages.
The article then presents the findings of Dr. Griffin's book on the topic Osama bin Laden: Dead or Alive? as "provoking shock waves".
This book presents evidence that bin Laden died, probably due to kidney failure, in mid-December 2001, which would mean that his taped messages since then have been faked to "stoke up waning support for the war on terror in Iraq and Afghanistan."
Perhaps the most controversial of all the tapes was released by the Pentagon on December 13, 2001, claiming that it had been found in a home in Jalalabad. Prior to this tape, bin Laden had, while praising the 9/11 attacks, consistently denied responsibility for them. But the bin Laden of this tape boasts about having planned them.
President Bush, the Blair Government, and the mainstream media all hailed this message as offering conclusive proof of bin Laden's guilt.
The Daily Mail, however, points to various reasons provided in Griffin's book to believe that the man in this video was an imposter. It refers to the existence of a "highly sophisticated, special effects film technology to morph together images and vocal recordings."
And it quotes Griffin as saying: "The confession tape came exactly when Bush and Blair had failed to prove Bin Laden's responsibility for 9/11 and both men were trying to win international public support, particularly in the Islamic world, for the anti-terrorist campaign."