The DAD in question may be John Giacalone, who basically got the fuck outta dodge right before shit went supernova hot…in February 2016. Conveniently when McCabe became Deputy Director and Scalia got bumped.
https://www.executivegov.com/2015/03/profile-john-giacalone-executive-assistant-director-of-fbis-national-security-branch/
https://www.linkedin.com/in/john-giacalone-2a322ab9