Hayward appeared before a House subcommittee in 2010 to discuss the disaster, but he often responded to questions with little more than "I cannot say."
Rep. Bart Stupak of Michigan wasn't buying it. "We thought we'd have more candid responses," he said. "You're the CEO, you headed exploration, you know what's going on."
Congressmen complained angrily about Hayward's evasiveness, while the CEO denied their accusations of "stonewalling."
Hayward was reassigned to Russia and has since left the company.
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