DEA reveals "parallel construction" techniques the "taint team" uses to disguise its reliance on NSA surveillance data

Okay. someone who understands the American constitution can tell me: Does the 4th amendment protect against groundless searches and seizures of property in general or does it just restrict the court from considering evidence that is obtained in an unlawful manner?

“The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized”

It seems that the DEA approach is to say that searches in violation of the 4th amendment are OK, provided there is a route to reaching the same information which was consistent with the 4th amendment which is then followed by the book. Is that accurate?