She attempted suicide, then talked to the elders an told him she was
gonna tell on him too, now that was in august, the sister told my
brother that since she didn't know his hall they couldn't do anything
I think that's your answer. It may all be pure made up bs from a suicidal girl. Maybe not, but maybe.
To echo pbrow, STOP SEXTING WITH JW GIRLS!!!
I won't be surprised if the elders request to see the naked picture.
I think there's no need to think like an elder. Just prepare for that ridiculous and unfair JC situation if he chooses to be part of it. The most important thing here is that the WT system is having its perfect effect in that boy. At the end of the day the elders and the WT have no authority over him. If you care about him, show him support, make him feel ok and not ashamed, and have a talk about responsible relationship and sex decision making, which if he's a JW, chances are he never had.
It will be a lesson for him in responsible choices, but around a messed up girl, not around any of that shaming Jehovah crap.