sentences:  In October 2005, Libby resigned from all three government positions after he was indicted on five counts by a federal grand jury concerning the investigation of the leak of the covert identity of Central Intelligence Agency officer Valerie Plame Wilson.He was subsequently convicted of four counts (one count of obstruction of justice, two counts of perjury, and one count of making false statements), making him the highest-ranking White House official convicted in a government scandal since John Poindexter, the national security adviser to President Ronald Reagan in the Iran–Contra affair.After a failed appeal, President Bush commuted Libby's sentence of 30 months in federal prison, leaving the other parts of his sentence intact.