From the keynote of the 22nd European Police Congress:
“I understand why the Darknet can be useful in autocratic systems. But in a free, open democracy, in my opinion, there is no legitimate benefit. If you use the Darknet, you are usually up to no good. This simple realization should also be reflected in our legal system.”
my source is this. but anyway, it is far from unprobable if the police does not like dark net.