“even if he does show up and assert his fifth amendment rights.
If you’ve been granted immunity, how can you plead the fifth?
I would guess that depends on what type of immunity he was granted: transactional or use immunity.
If you are granted immunity, WHY plead the fifth at all?
No, this was a bribe to him to let him stay silent while APPEARING to proceed with the “thorough, unbiased, independent investigation”, to AVOID getting answers to questions they did not WANT to ask.