Can someone explain why the CEO was held 'personally liable'?[1] Whenever companies behave like (at best) like dipshits, I've only ever seen 'the corporation is

Can someone explain why the CEO was held 'personally liable'?[1] Whenever companies behave like (at best) like dipshits, I've only ever seen 'the corporation is a person' and hence liable. Why single out the CEO personally in this one? Is this at the judge's discretion? [1] http://arstechnica.com/tech-policy/news/2010/05/major-copyright-defeat-tastes-sour-for-limewire.ars http://arstechnica.com/tech-policy/news/2010/05/major-copyri...