Who will chair the audit committee?

Christopher Williams, who was on the audit committee when allegations of bribery in Mexico first surfaced and has chaired the committee since 2008, will be stepping down from the Walmart board in a few weeks. Who will be the new chair of the audit committee? It’s an important question, considering that the audit committee is charged with overseeing the FCPA/bribery investigation (even though it ignored investor concerns and failed to establish the right internal controls in the first place).