Washington, District Of Columbia -
(NBC News) General Motors CEO Mary Barra faced another brutal day before Congress Wednesday.
Barra was grilled for a second day over the ignition switch defect linked to at least 32 crashes and 13 deaths.
"I think it's likely and appropriate that GM will face prosecution based on this evidence," Connecticut Senator Richard Blumenthal told Barra.
General Motors now admits the company knew about the defect at least a decade ago, but failed to warn customers and may have tried to cover it up.
"I can not tell you why it took years for a safety defect to be announced in that program, but I can tell you, we will find out," Barra promised.
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