elders assigning a child to work with a known pedophile in field service, is probably unlikely to exist in other cases.
I thought that, but apparently that's exactly what happened in the other case that the WTS just lost to Zalkin. They assigned the pedophile to study (so even worse than going in FS) with the victim since his father wasn't in the cult.
The malfeasance issue seems to be the strongest point the WT has - who remembers who assigned who to work with who in field service last week, let alone 15 years ago?
I'd guess the kid that got raped as a result might remember. The point is sound though, there's not likely to be any clear testimony on this topic and even if there was it would be easy to dismiss due to the time that's passed. I can't think how there'd ever be any hard evidence of such an assignment, either.
Hopefully a precedent will be set and the sharks will begin to circle.