Hume hosted law prof John Yoo to analyze court challenge to Bush's Gitmo policy,

Never disclosed that Yoo designed it

In an interview with former deputy assistant attorney general John C. Yoo on the April 7 edition of Fox News' Special Report with Brit Hume about a federal court challenge to the Bush administration's handling of so-called "enemy combatants,"

Fox News Washington managing editor Brit Hume presented Yoo as an impartial legal expert. In fact, Yoo was a primary architect of the exact policy under review in the case that Hume invited him to discuss on the program.

But Hume did not even identify Yoo, now a law professor at the University of California, Berkeley, as a conservative, introducing him merely as "law professor John Yoo of the University of California at Berkeley" and "a former deputy assistant attorney general in the Justice Department's Office of Legal Counsel, where he served from 2001 to 2003."
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http://mediamatters.org/items/200504110004