Amendment IV 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. Witnesses are needed to provide the evidence to leads to PROBABLE CAUSE. They are to be made publicly known with such evidence and the 6th amendment allows the accused to face their accusers. Now I am not pretending to be a lawyer here but FBI says none of that is important. It's morally and ethnically WRONG to entrap people into crimes that would not have done with FBI agents infiltrating these groups. If the FBI weren't pulling this shit there would be next to no terrorists or terrorist crimes at all. But the FBI needs that federal budget to justify.