The government has so devolved -- they're using (most likely illegal) nsa spy tools and stolen data to arrest drug dealers, then lying to everyone involved about how they "stumbled" across the information, or so-called "parallel construction" [1]. While all the tools whine about slippery slope fallacies, the fact of the matter is we're already sliding down.
The undated documents show that federal agents are trained to "recreate" the
investigative trail to effectively cover up where the information
originated, a practice that some experts say violates a defendant's
Constitutional right to a fair trial. If defendants don't know how an
investigation began, they cannot know to ask to review potential sources of
exculpatory evidence - information that could reveal entrapment, mistakes or
biased witnesses. [2]
Although these cases rarely involve national security issues, documents
reviewed by Reuters show that law enforcement agents have been directed to
conceal how such investigations truly begin - not only from defense lawyers
but also sometimes from prosecutors and judges. [3]
[2] http://www.huffingtonpost.com/2013/08/05/dea-surveillance-co...
[3] http://www.reuters.com/article/2013/08/05/us-dea-sod-idUSBRE...