First, this is fantasy storytelling by amateur writers. Professional writers put things into movies and books that are unbelievable and we suck it up like Kool-Aid. Following that if someone criticizes you or your friend’s writing you could ignore it or say thanks for the input.
Second let me review some of the network the Junkers are part of and why this raid and subsequent trial makes no sense at this time from an RP point of view. Liberty is at war with Rhineland and Bretonia is at war with Gallia. Until the Gallic war at least is over, Liberty would be likely to turn a blind eye to the Cardamine trade as far as the Junkers are involved in PR. The Outcasts (source of Cardamine) are currently working with the Bretonian government and Liberty would be aware of that. You want realistic, here it is. Governments do this all the time. Are the Congress acting arrogant? Yes. They know their position is strong due to the current political situation. Liberty and Bretonia need intelligence and quasi lawful groups provide a lot of intelligence for governments. Not forgetting the logistical support they provide in areas where the authorities cannot be seen operating.
This type of thing does happen in the real world and it is usually a loose cannon or an uninformed PD that does it and things either get swept under the rug by the Feds or a scapegoat is found. Whoever conducted this raid in real life would have been balled out for it.