Diplomatic Immunity?

I kept hearing that Straus-Kahn didn't have diplomatic immunity, but I wasn't hearing why, and the current Wikinews article doesn't include any details. So, I hunted down some articles and background. If you're wondering, check out http://www.telegraph.co.uk/news/worldnews/europe/france/8515090/Dominique-Strauss-Kahn-does-not-have-diplomatic-immunity.html , http://www.bbc.co.uk/news/world-us-canada-13412092 , and http://www.propublica.org/blog/item/what-role-diplomatic-immunity-may-play-for-imf-chief .