Horowitz discovered premeditated fraud on the FISC by a DOJ attorney. In 2016, the attorney „altered“ email from „the other U.S. government agency“ (CIA) and submitted a fraudulent application for a warrant to the court. So the FISC approved the warrant.
The target: Carter Page, a Naval Academy graduate and a former Trump presidential campaign associate. Spying on Page — an innocent man — opened a door to spying on President Donald Trump.