Jurors in the trial of former White House aide I. Lewis "Scooter" Libby delivered guilty verdicts on four of five counts of perjury and obstruction of justice Tuesday, following a four-year investigation into the leak of a CIA agent's identity.

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Federal investigators announced multiple arrests and indictments Thursday in an insider trading scheme that involved four of Wall Street's biggest institutions. Margaret Warner reports, and then guests discuss the case.

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The city of New Orleans filed a claim against the Army Corps of Engineers on Thursday, seeking $77 billion for damages sustained when the corps-built levees broke during Hurricane Katrina, flooding 80 percent of the city.

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International Criminal Court prosecutors on Tuesday named a Sudanese minister and a militia leader as the first two official suspects of war crimes in Darfur.

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The Supreme Court heard two notable cases this week, one involving lawyer rights for parents of special education students and the other on the constitutionality of police tactics in high-speed chases. The National Law Journal's Marcia Coyle details the arguments.

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Evaluations of the U.S. attorneys recently dismissed by the Justice Department under a little-known USA Patriot Act provision described them as "well regarded" and "very competent." Analysts discuss the firings and congressional charges of political tampering.

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The Supreme Court has released the audio tapes of some of its highest profile hearings, granting the public unprecedented access to courtroom proceedings. NewsHour correspondent Kwame Holman reports on the sounds of the Supreme Court.

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Mexican President Felipe Calderon has proposed a 12 percent increase in public security spending and ordered 10,000 soldiers transferred to the polic force in efforts to crack down on crime and drug trafficking. Saul Gonzalez of KCET-Los Angeles reports.

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Prosecution and defense lawyers gave their closing statements on Tuesday in the trial of I. Lewis "Scooter" Libby, Vice President Cheney's former chief of staff, who is charged with perjury and obstruction. A Washington Post reporter updates the trial.

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The U.S. Supreme Court threw out a $79.5 million jury award levied against the Philip Morris tobacco company, ruling in a 5-4 decision Tuesday that the verdict was invalid because the jury had overstepped its bounds.

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