the attached document will give you an insight into Napper's timeline. I have included links to various document sourced on the net; these contain some pretty interesting information.
What the timeline shows, is when Napper was involved in the WA Uni forensic facility, which BTW was run totally independent to the Chemistry Centre which WA police use. Nappers involvement at the WA Uni's facility was for a number of years between 2001 and 2006, therefore he may have had (direct) access to forensics and other material, or he may have been given information direct from scientists (associates) involved in the Chemistry Centre -- responsible for undertaking the forensic examinations connected to Claremont murder investigations. If he was given access during the 2001 - 2006 period, he more than likely would have been placed under a 'secrecy and non disclosure' contract. If this is so, the non disclosure restrictions may have (currently) expired.
I have not included all information and documents that are available on the net; only the ones that I found that could provide timeline dates and relative information.
Napper would have been around the periphery for a considerable number of years and at the time of the many lead up reviews, prior to the Shramm review, were done. There is a particular piece of passage in one of the ABC transcripts I have included, and that shows clearly where Caporn's leadership led the teams and their investigations, he controlled -- directly into the quagmire. No wonder the socalled reviews (prior to Schramm's) ended up with nothing new !
Sorry Sutton, leadership really does matter !