A lot of this discussion is bullshit like the two witness rule being applied to sexually abused minors.
Lets get real. Here in part is what happens:
during January 2009-December 2010. There were 16 female and nine male children, who presented with history of vaginal, anal, or anogenital penetration by penis. All children were in the age group of 4-11 years. All the girls were premenarchal. One 11-year-old girl was mentally retarded.
After providing acute emergency care, parental informed consent was obtained for detailed anogenital examination and necessary surgical intervention. All children were examined in the operating room under sedation in supine-frog-leg position for documentation of anatomic findings. [1,2] Requisite body swabs were obtained to complete the medicolegal formalities. Details of genital, anorectal, and sphincteric injuries were noted. Photographic evidence was also recorded.  Severity of injuries was judged by perineal tear classification. 
Nine children who had no anogenital injuries (AGI) were excluded from the study. Similarly, eleven other children having first and second degree injuries were managed nonsurgically and were also excluded from the present study.
Those children having first and second degree injuries who were managed nonsurgically still had bruising. Those that had no traumatic injury were still emotionally traumatized.
The idea we need to have two witnesses to a crime like this is laughable. The idea that the WTBTS feels that two witnesses takes precedence over reporting a crime is despicable.
Even Jesus, who spoke about the two witness rule as fit and proper felt strongly about the treatment of children.
Jesus said, “Let the little children come to me, and do not hinder them, for the kingdom of heaven belongs to such as these.”
— Matthew 19:13-14
“Let the little children come to me, and do not hinder them, for the kingdom of God belongs to such as these. Truly I tell you, anyone who will not receive the kingdom of God like a little child will never enter it.” And he took the children in his arms, placed his hands on them and blessed them.
— Mark 10:13-16
People were also bringing babies to Jesus for him to place his hands on them. When the disciples saw this, they rebuked them. But Jesus called the children to him and said, “Let the little children come to me, and do not hinder them, for the kingdom of God belongs to such as these. Truly I tell you, anyone who will not receive the kingdom of God like a little child will never enter it.”
— Luke 18:15-17
Do you think that a JW sexually abusing a child.....might be considered a 'hindrance'?