He was never allowed to return to the States was he, or make films in any country that might extradite him.
Wasn't that purely because there was an outstanding sentencing hearing when he fled the country? In other words, he hadn't served any of his sentence for any of his crimes. It wasn't part of any international film makers code that stopped him. I wonder how many people who signed the Evans petition wouldn't think twice about going to see films like Frantic or Tess? Of course, it might have been a lot different had the WWW been around then!