In the case of murder, the sentence is up to life in prison. So, in this case it will depend on the circumstances. Accidentally killing someone will not give you the same punishment as murdering several people.
Let’s say, if you do a robbery and kill someone, you, Robert gives you 2 years in prison and murder 20 years (I am making the numbers up, I don’t actually know) then you will be sentence for only 20 years (because this already includes 5 years).
Does anyone knows Code Lyoko outside of France?