The Libyan Embassy incident in London comes to mind, where automatic weapons fire from inside the embassy killed a London policewoman. No one was ever prosecuted. http://news.google.com/newspapers?nid=2519&dat=19840418&id=3aFdAAAAIBAJ&sjid=-FwNAAAAIBAJ&pg=3533,2942629
Sorry, we don't allow throughout history questions. These tend to produce threads which are collections of trivia, not the in-depth discussions about a particular topic we're looking for. If you have a specific question about a historical event or period or person, please feel free to re-compose your question and submit it again. Alternatively, you may PM /u/caffarelli to have your question considered for an upcoming Tuesday Trivia thread.