It isn't double jeopardy.  It's perfectly legal.  But what is the point?  This is just a tiny aggravation in comparison to what Casey Anthony has already endured.  If it is meant to punish her for the death of her daughter then it is too little too late. To think this could be punishment for the death a child is a disgrace.   If she is really guilty this little pinch is nothing compared to what God has in store.  And if she is innocent ..then it seems petty. I just do not see the point of this exercise.