Doing some digging around the Catherine Herridge pen pictures and found this.

FBI Office of General Council Attorney at the time was James A Baker, the one who altered the email.

Twitter has just appointed him to General Council.

Article from June 17th

https://www.law.com/corpcounsel/2020/06/17/twitter-adds-former-fbi-general-counsel-to-legal-department/?slreturn=20200619184657

Here's the Tweet from Sean Edgett https://twitter.com/edgett/status/1272672653841580032

Massive. Why would Twitter be hiring this guy?