Pages 433-437 inter alia, of the book "Myers on Evidence in Child, Domestic or Elder Abuse Cases" Fourth Edition refers.
You can view this very informative material at Google books.
This shows how the Watchtower's strict interpretation of the biblical two-witness rule is very much out of harmony with the modern legal system in matters of child sex abuse.
J.R. Brown, Watchtower spokesman, is reported by the Associated Press on February 11, 2001 to have said:"...corroborating evidence can be used instead of a second witness to prove wrongdoing." Although this appears to be a reasonable approach and is an improvement on the horrendous requirement that there be two human witnesses before congregational action can be taken in the absence of confession, requiring corroborating evidence is still incongruent with the standard of evidence accepted by the courts.
It is often the case that there is neglible corroborating evidence in cases of child molestation. The Courts generally expect that corroboration is required only if the child's testimony is so contradictory and in conflict with physical facts, surrounding circumstances, and common experiences that its validity is doubtful.
Either way, the elders should at the least be permitted to accept the testimony of the child, together with the testimony of the concerned parent/caregiver, as sufficient to satisfy the 'two witness' scriptural rule. Jesus made it quite clear that non-human testimony, ie, the works he was doing (John 5:36; 10:25) counted as a witness, so the parent hearing or observing the child's statements or changed behaviour should count as a second witness (in addition to the child's), as a type of 'corroborating evidence'. These two 'witnesses' should be more than sufficient for the elders to assume prima facie guilt, even if the accused denies guilt, unless the child and parents testimony is "contradictory, in conflict with physical facts, surrounding circumstances, and common experiences". Ie, the child's testimony should be believed unless there are very good reasons to doubt it.
I can't figure out how to insert the link to the e-book, sorry.