My brother has not be setenced for a federal sexual crime yet, is there anything we can do to help him before they do?

Since he has already plead guilty and the plea has been accepted, it is probably going to be very difficult to get the charges dropped. However, because he has yet to be sentenced, you need to get in contact with his attorney as soon as possible to discuss the impact of his disabilities on his sentence and kind of punishment/treatment. You need to provide as much as evidence as possible to the attorney regarding this condition(s) so that he or she can make the best possible argument for a more appropriate confinement/treatment.

Disclaimer: This answer is provided as a public service and as a general response to a general question, it is not meant, and should not be relied upon as specific legal advice, nor does it create an attorney-client relationship.

I agree with the sage assessments of Mr. Walcutt, and also urge you that whatever you are going to do, be done quickly, as December will be here shortly. Good luck.

DISCLAIMER: I do not practice law in your State. This answer is provided solely for informational purposes only. This answer does not constitute legal advice, create an attorney-client relationship, or constitute attorney advertising.