Timing is key to this plan.
Remember, the cabal is used to lying to get their way. They are also used to being able to get leaks about testimonies so they know which way to "recall" in order to back up their claims.
Normally, recordings taken without permission/knowledge can't be used as evidence, except during cross-examination. If two testimonies conflict or there is doubt, recordings (Prism) can be introduced into courts.
That is why all of this stuff is staying very tight lipped and being walked slowly. It's also why DC is losing their shit. They don't actually know what way to testify or what questions will be asked….