Fruit of the poisoned tree. Illegally obtained evidence invalidates all the evidence. Case over.
If all 13 of the PTT folks in question OK-clicked-away some innocuous-looking message infobox about privacy that was presented far into the transition, not when they first began using the devices, that would explain the smugness of Bob’s spokesman about ‘consent’.
Except this is political as impeachment doesn’t follow law, but politics.