Will have a go at the "time line"..please jump in to correct as I'm sure I am v v confused.
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Nanna plans to go to Berlin with Amir. (says she will spend w/e with friends) She packs rucksack and leaves at station (though, why so small a bag?? mine would have been huge)
31st October: she goes to halloween party but leaves quite soon, seeming happy , as if she's going to see someone she loves.
She cycles to Rama's house to give him some books back - obviously fond of him as a teacher? (maybe once had a crush?)
Is supposed to be going to airport to meet Amir but realises hasn't got passport. Oh I left it in the flat, she thinks, when I was seeing ...[who? troels? Shagaround? a combination?] so she gets a taxi up there
Meets Shagaround in the entrance and he lets her in [evidence that that's what he is doing, in the video which so conveniently appeared in Kund's flat...conveniently for whom? If Bremer, why?)]
At some point she is then attacked and raped in the flat by someone, attempts to defend herself with paperweight but presumably ends up ko'd on radiator. Somebody at some point then takes her, unconscious, downstairs (? lift is broken? could she have gone on her own 2 feet, willingly? eg if she woke up and contacted Vagn the family friend?)
She is then held somewhere with a concrete floor for many hours - long enough to be raped again, bathed,nails clipped and changed while drugged with ether, and long enough to get sores on her skin from floor. [Probably wearing slip by then, not jeans. Whoever did this HAS to be a cold clinical serial killer type...surely someone just working for polical ends, ie to discredit someone, would not manage to get details so honed]
Then we don't know if 1) she escaped, somehow, and ended up running away through the woods, or 2) she was being taken there in the black car and then let out to run through the woods and be chased. If 1) maybe she managed to grab random clothes and the video card and they either fell or she dropped them as clues - which seems quite sensible considering she must have known she was dealing with a maniac by then.
If 2) maybe killer was keeping those things and they somehow fell out of the car? or she may have picked them up from Rama's and they may have then found their way out of her bicycle basket? They were found in a slightly different part of the woods anyhow I think?
Finally she is caught by the man chasing her, is drugged again and put in carboot tied up. (and let's not argue about whether she was drugged or not, i don't want any more nightmares) Presume clean clipped state of her forensics remained clean as mud would wash off in water. You would think there would be something in the car to DNA the killer, though, wouldn't you? [hmmm]
Finally! Just a thought - could Nanna have been the runaway girl Rama was helping? I don't think he has told everything - perhaps TRM is his landlord too.
HTH ??????