Here is proof from the United States Foreign Intelligence Surveillance Court that security agencies have been operating outside the law: https://www.dni.gov/files/documents/icotr/51117/2016_Cert_FISC_Memo_Opin_Order_Apr_2017.pdf
On page 4 the federal court that oversees the spy program states that the US government has not been in compliance with procedures governing the acquisition of data from spying. Moreover, the full scope of noncompliance "had not been previously disclosed to the court."
The document describes aspects of the government's noncompliance with the law and steps the government assures the court that it has taken to bring surveillance into compliance with the law.
Historically, police states have told courts whatever the courts wanted to hear and proceeded with their police state activities. The conspiracy that the House Intelligence Committee has uncovered between US security agencies, Hillary Clinton, and the presstitute media to overturn the election of President Trump is sufficient evidence that the police state remains out of control. Whether the Republicans on the Intelligence Committee will use the facts to bring the police state under control or wimp out on "national security" concerns, as Republicans tend to do, remains to be seen.