Who committed credit card fraud on a business account?

I was on the Board of a non-profit and opened a business credit card in my name several years ago (card had my name and business name on it). I left the Board, but never closed the account. The agency and the director continuted to use the card long after I left without my knowledge (bills went to agency). Ends up that director used it for thousands in personal expenses. The current Board found out, fired the director, but kept the account open and allowed her to start making personal payments (all without my knowledge). Who, if anyone, committed fraud? Seems like the director for sure. How about the agency for using the card after I left (even if they thought if was for business). How about the agency after learning of fraud but didn't do anything? Or is it all my fault? - Is this your question? Add additional information