The second slide seems rather suspicous in its placement of "CAST members are not qualified to testify after reading this"; almost as if they were not speaking to an audience of CAST members, but rather, the public.
Perhaps a decoy? to draw attention away from STINGRAY and other intricacies?
Sounds like they are doing advance witness tampering by trying to get CAST members to evade calls to testify on material facts known to them should they receive such, not lobbying the public via anticipated future leak.
(I’m not even sure how the statement about testimony would be expected to manipulate the public.)
If you’ve ever had to testify as an expert, it’s an art and a science. You need a lot of training to be able to respond to the traps attorneys will set for you.
My guess is that this looks like training material for low-level desk jockeys to help do all of the legwork gathering evidence that would be presented in court cases.
Stingrays you would think would be more of a targeted operation and likely handled by a different group of people.
I did some work on their compliance team in 2010/2011 and the merger was one of the reasons why I left.
Funny enough, US Cellular divested their Chicago holdings back in 2012 to Sprint but never moved their HQ. None of their HQ employees have cell service through them.
If you aren't careful, your target could become aware of their presence.
If you are pulling data from the carrier, there's less logistics involved and your target shouldn't notice unless someone screws up.