No. This thread refers to something different, called the "silver platter doctrine." It says that if law enforcement is the beneficiary of evidence received independently from third parties this evidence can be used in court against the perpetrator. Why? Because law enforcement did not violate any laws in gathering the evidence, though the third parties may have done so. Of course, law enforcement cannot act illegally through agents and those against whom such evidence is used claim that the third parties were not acting independently of law enforcement.