So sources are saying Heather Sawyer is the Feinstein staffer who leaked the CBF letter.

She gets around

https://nadler.house.gov/press-release/rep-nadler-names-democratic-chief-counsel-judiciary-subcommittee-courts-intellectual

Here's a video of her - matches up with the person sitting in the background during the CBF circus.

Fast forward to 25 minutes or so

https://www.loc.gov/today/cyberlc/feature_wdesc.php?rec=4247