The other possible reasonis that it may say in the French constityution that citizens cannot be extradfited to third party states under certain conditions. As An example of something like this look at Ronnie Biggs one of the UK's great train robbers. He fled to Brazil, and managed to avoid extradition for 16 years as he had fathered a Brazilian child, and under Brazilian law, he had to remain in Brazil to pay for the childs upkeep. Any idiot can face a crisis - it's day to day living that wears you out.