I’m afraid the NSA regularly funnels information to the FBI and other domestic policing entities, and this has been widely documented [1]. The government even deigned to declassify proceedings from their special secret (!) court that decry the practice where NSA gives illegally-obtained surveillance to the FBI, which then manufactures a reason to go after someone using a technique known as “parallel construction,” concealing the surveillance source(s).

[1] https://theintercept.com/2019/10/10/fbi-nsa-mass-surveillanc...