Yes, Sweden has "fri bevisföring". And why not? If evidence proves that someone is a criminal, it is not less true it was retrieved by controversial means. "Fri bevisföring" means that the court makes the decision whether the evidence is valid, based on circumstances in the case in question.
Because it means that restrictions on search and seizure aren't worth the paper they're written on. If you're a police officer, why wouldn't you illegally search or track someone if you think it'll help you get a conviction? There's fuck-all chance you're going to get in trouble for it, your bosses and the prosecutors care just as much about nailing the guy as you do.
Where would you draw the line? Why not simply monitor and track everyone everywhere all the time because hey they if they did something wrong then you'd be good to go with the proof... and we all know if you don't do anything criminal you don't have anything to hide...
