Its surprising that in a case as serious as child molestation, they can not come up with something creative that would allow them to have their 2-witness rule and still do the right thing.
Some sort of 'Theocratic Warfare' like "Jehvoah is the second Witness". Although, like their policy which makes lying OK if it is done for 'Theocratic Warfare', this would also be open to misuse. But that would still be preferable to having molesters not get caught!
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For interesting Watchtower Society literature quotes, complete with references but without any editorial, check out: http://Quotes.JehovahsWitnesses.com