WASHINGTON (AP) - Who knew about the deception, when did they know it and who directed it?

WASHINGTON (AP) Who knew about the deception, when did they know it and who directed it?

Those are among questions that state and federal investigators want answered as they plunge into the emissions scandal at Volkswagen.

The cheating scheme has cost the chief executive his job, caused stock prices to plummet and could result in billions of dollars in fines.

Legal experts say the German automaker is likely to face significant legal problems including potential criminal charges arising from its admission that 11 million of its diesel vehicles sold worldwide contained software specifically designed to help cheat emissions tests.