Info on John Carlin… not sure if this is accurate, but i have seen it said he performed the polygraph on CBF:
https://themarketswork.com /2018/05/21/john-carlin-the-former-nsd-head-who-enabled-the-fbis-carter-page-fisa-warrant/
"John Carlin – The Former NSD Head Who Enabled the FBI’s Carter Page FISA Warrant
May 21, 2018 by Jeff Carlson, CFA
John Carlin was an Assistant Attorney General – and Head of the Department of Justice’s National Security Division (NSD).
On September 27, 2016, Carlin announced his resignation. He formally left the NSD on October 15, 2016. Carlin had been named Acting Assistant Attorney General in March 2013 and was confirmed in the spring of 2014.
Carlin had previously served as chief of staff to then-FBI Director Robert S. Mueller.
Carlin was replaced with Mary McCord – who would later accompany Acting Attorney General Sally Yates to see White House Counsel Don McGahn regarding General Michael Flynn.
Carlin announced his resignation exactly one day after he filed the Government’s proposed 2016 Section 702 certifications. His signature can be found on page 31."