[1]https://news.yahoo.com/inspector-general-says-post-office-surveillance-progra
m-exceeded-legal-authority-172808526.html

An inspector general probe into the U.S. Postal Service surveillance program, kn
own as iCOP, concluded that the agency did not have the legal authority to cond.
..

References

   1. https://news.yahoo.com/inspector-general-says-post-office-surveillance-program-exceeded-legal-authority-172808526.html