Are you serious? Where did you get that information?
Information from earlier posters with credible cites of Dutch Law. If I re-locate them I'll pass them along. I believe the absolute maximum for murder was 20 years...and most thought 12 - 14 years, if Joran was found to be guilty.
The Dutch believe that people can be rehabilitated. In my research, it looks like the typical sentence is about 12-15 yrs. In addition, about 1/4-1/3 of the sentence gets cut for good behavior.
The extreme circumstances do not exist in this case...trust me, there is a recent case of a guy who killed his 4 yr old daughter and cut her up into little pieces, and he got 12 yrs....
Oh, btw, attempted murder gets you 2-4...