Before I proceed: Thank you for sharing your thoughts and I hope you continue to do so.
. . .There's no evidence he's linked to any other missing children or abductions, which would have surfaced by now if that were so. . . .
". . .Von Aesch had a criminal record and was sentenced to 15 months in jail in 1961 after trying to extort ten thousand Swiss francs from a businessman in Zurich by threatening to kidnap his young son. He has sent him a letter saying "...how terrible must it be, to live through the day not knowing if your dear Geni will return from day care..." (translated) . . ."
http://en.wikipedia.org/wiki/Urs_Hans_Von_Aesch
News reports also say he is being investigated for some missing children from the 1980's so I consider that evidence that it is a real possibility. And he has been already diagnosed as an infantile pedo if I remember the news article correctly. I believe this was from a previous case so I think there is actually evidence he was not performing a single never-before-done crime.
Texana said:
. . .There's no evidence he was actually near the McCanns at all, other than a white van. . . .
The news article says that police have determined he was there and I think one article I read said he was seen. (I will look for the link but I believe it was from links already available in this thread.) The white van near the mccanns apartment was never confirmed in the news article to have been the one belonging to Urs Von Aesch so I was never basing the connection solely on that one item.
Texana said:
. . .Between the reward and the publicity, any copycat abductor might well have been inspired to copy Madeleine's presumed abduction.
I agree and sadly it may happen again.
Now while I am on the subject of Urs Von Aesch:
I am concerned that he may indeed not have done the crime even if he was there and probably was watching Madeleine and her family's habits. What concerns me is that if he indeed did the 1980's crimes he had a certain cooling off period between kills and that time seems to have been longer than the time between Madeleine's disappearance and the switzerland crime. There are reasons that he may have changed the cooling off time or varied the timing and some of those reasons have been pointed out to me but it concerns me anyway.
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Source links for most of the above comments:
". . .
Von Aesch had a criminal record and was sentenced to 15 months in jail in 1961 after trying to extort ten thousand Swiss francs from a businessman in Zurich by threatening to kidnap his young son. He has sent him a letter saying "...how terrible must it be, to live through the day not knowing if your dear Geni will return from day care..." (translated) . . ."
http://en.wikipedia.org/wiki/Urs_Hans_Von_Aesch
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". . . The case has been investigated for links to the murder of several other young people in the 1980s. . ."
http://news.yahoo.com/s/nm/20070915/ts_nm/swiss_missing_dc
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" . . .Police in Portugal were alerted after it was revealed that Von Aesch had been on holiday near the Algarve resort of Praia da Luz when Madeleine, four, was kidnapped.
Detectives in Switzerland believe that the critically injured man who is aged 46 has vital evidence over the abductions and was about to blow the whistle. . ."
http://www.express.co.uk/posts/view/15806/Madeleine-lookalike-snatched-by-pervert
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". . .Portuguese police were alerted via Interpol to the potential link between Von Aesch and Madeleine. . . ."
" . . .
Swiss police informed colleagues in Spain and Portugal after learning that Von Aesch lived near Alicante and was on holiday in the Algarve at the beginning of May.. . ."
". . . The pretty blonde-haired Swiss girl is of similar height, build and age to Madeleine.. . ."
http://www.express.co.uk/posts/view/15806/Madeleine-lookalike-snatched-by-pervert