"Madeleine police set to make first arrests: British officers fly to Portugal to quiz 'three burglars who targeted homes near McCann apartment'
http://www.dailymail.co.uk/news/art...stigation-disappearance-Madeleine-McCann.html
Maybe they are looking for these 'burglars' as witnesses. If they were creeping around town on a regular basis, they might have seen Madeleine being taken away by...someone.