This is the problem with parallel construction. It's what the DEA + FBI use on a "daily basis". They're instructed to do it and it's highly illegal. What they call parallel construction, Americans call "information laundering".
This is such an extreme situation that I don't mind them using it, but parallel construction needs to be removed from the US justice system. That's how communist dictators should operate, but not American law enforcement.
This was the main point of the @Snowden leaks. The government is scooping up EVERYTHING and using parallel construction to cover their tracks. Big Brother in the extreme.