Here is a place to download the BCO.

31-8. Great caution ought to be exercised in receiving accusations from any person who is known to indulge a malignant spirit towards the accused; who is not of good character; who is himself under censure or process; who is deeply interested in any respect in the conviction of the accused; or who is known to be litigious, rash or highly imprudent.

31-9. Every voluntary prosecutor shall be previously warned, that if he fail to show probable cause of the charges, he may himself be censured as a slanderer of the brethren.

So where did Steve Wilkins ever get to meet and reply to his voluntary prosecutors who without fear or favor, courageously accused him of heresy?

Never happened.  But that didn’t keep them from writing their emails to those they were plainly told would be sympathetic at SJC.