AlthoughLaw has always considered scientific developments and this science find natural sciences very useful, Medical Law is one of the fewest legal references which has made progress simultaneously with scientific developments and is up to date e.g. study and investigate on stem cells can be mentioned. In fact legal concerns for legislators of various countries in treatment and research methods used in stem cells shows the importance of this concept. In this regard, the skip genetic method is a modern and effective (in France Legal System) and in this essay, it is considered as a reflection of Medical Law in Criminal Law. In general, the purpose of using this method which stem Cells will be used is to help the activists of justice system to prevent crime and pursue the offenders. This method plays the role of proof of claim in criminal procedure and it will be useful in specific Criminal Law to confront some of the special crimes. Nevertheless, as it will be observed further, this method is not flawless in France Legal System. It is also considerable that Iranian legislators sees this method as a system of achieving justice and prepare some arrangements to use it as much as possible in our country.