I don't see a reason to restore a citation about the trial beginning. But here's the ref if you'd like to make a record for your own interest: 
 :cite news|last1=Mullholland|first1=Rory|title=Dominique Strauss-Kahn trial opens for 'pimping'|url=http://www.telegraph.co.uk/news/worldnews/dominique-strauss-kahn/11384848/Dominique-Strauss-Kahn-trial-opens-for-pimping.html|work=Daily Telegraph|date=2 February 2015 
 :