The state prosecutor also said that they decided to prosecute after seeing other prosecutors bringing charges against other German purchasers of "class 2" material, and ordered the searching of his home based on experience that people caught for that also have "class 1" material at home.

Yes, and this is what sets my alarm bells off. Edathy is known to have purchased stuff that is LEGAL. There was no justification at all for a search warrant. "You have been caught driving with exactly 49 km/h. It is our experience that people who are so near to the speed limit exceed it when they think they won't be caught." It's opening the door to arbitrariness.