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Claudia Silva e Sousa went missing in 1994 in Braga, almost 20 years ago! How you find a connection there?
Rui Pedro was 11 years old and went missing in 1998; Jorge Sepulveda was 14 years old and went missing in 1991 (22 years ago!); Rui Pereira was also 14 years old when he went missing in 1999. You can hardly compare these cases with a 3 year old going missing.
Joana Cipriano was murdered by her mother and uncle and their convictions have been upheld by all of the appeals courts, inclulding the Supreme Court. I suppose João Cipriano's confession and the evidence must have been rather strong.
As for Madeleine McCann there is no evidence to support the abduction theory, so you cannot put her name on the list of abductions. Missing yes.
AFAIK, René Hassee disappeared on a deserted beach right in front of his parents. Hardly likely an abduction but JMO.
ETA: Regarding Rui Pedro Afonso Dias had always been the main suspect and was convicted and sentenced to 3 years and 6 months in prison on 4 March 2013 for abduction of a minor.
Yep, it all started in 1991, up in the north near Oporto and 16 years before Madeleine went . Approx every 18 months to 2 years, another child was taken, mainly in the North, but Rene Hasse was taken from the Atlantic Coast of the Algarve, just 18 miles WNW of PdL in 1996.
In, or about, 1999 the son of an Elite was taken in for questioning and IIRC charged. Someone got him off. I now think I know who that son of an Elite was .... and who that man was who got him off ... a very powerful man ... loads of clout.
All information now whitewashed off the internet ... which I find very intersting, tbh.
As far as I am aware there was a gap then for about 5 years altho IIRC a child went missing in Madeira and another child vanished in peculiar circumstances.
Anyway, it all started up again in the Algarve region when Joana went missing in 2004 after what seems to have been a five year break. Then as stated previously, Carolina (late 2006) and Madeleine (2007)
So 1991 to 2007 is 16 years and it had been going on for that time .... 16 years. More or less every 18 months to 2 years a child had been taken.