You say that if he comes to the US he is fair game, so I assume you believe that he deserves to be punished for this heinous crime. Why is your belief on the metering of justice conditional.
Also, his wife was a seperate incident, the 13 year old had nothing to do with this. If you give someone a free pass because something bad happened to them earlier in their life, you will let a lot of murderers and rapists back onto the street.
Or do you feel this way because he is famous and has produced some flicks that you enjoyed?