Clearly visible abusing boys; no better evidence. Police say, "These photographs are now 'missing'."
The perfect solution (back in 1979) would have been to DISPLAY THESE PICTURES, OUT THESE SICK FUCKERS; all of them. This would have ended any speculation as to whether Messham was a Walter Mittey-like fantasist or not. I mean, what is going on here? Either there were polaroids or there were never any polaroids.
The (polaroid) camera never lies.
SUPPLEMENTAL READING: as we're talking 'institiutionalised exploitation of one helpless slice of society' i.e. young boys in care homes, if you hadn't already heard about it, and it's not just one-mad-woman's testimony this time, here's information about the joint USA-Canada psychological-mind-control drug-and-sexual-abuse effort known as MK ULTRA starring Bryce Taylor, Cathy O'Brien et al.