They were being observed, witnesses saw men observing the apartment. Also there were charity collectors collecting for a bogus charity, a bit of a coincidence they happened to be around at the time.
I have now been approached on 4 occasions by a total of 5 charity collectors, all within Luz.
Based on behaviour and conversation, I believe 3 of these occasions (4 collectors) to be bogus. It is a common, frequent scam perpetrated (I believe) on non-Portuguese residents. The last time I checked the minimum wage in Portugal, it was €5.70 per hour. Getting €10 off a gullible foreigner is therefore a worthwhile activity.
The last time I was approached was in October 2016. I had a visitor doing a Luz Tour and we were sitting outside Kellys, in fine sunshine, discussing the case, when a man approached us. Thinking back on his behaviour and conversation, I believe he was genuine, but at the time, being aware of the charity collector scam, we declined to contribute.
To be honest, I feel somewhat guilty about this now because frankly I can afford to donate €10 to a good cause. The man was finding it tough going to get contributions, partly because of the scam awareness, and partly because workers in bars etc often get employed for a cash-in-hand rate of 4 or 5€ per hour i.e. they are trying to scrape a living themselves.
Now the fact that this approach occurred in the midst of a Luz Tour is sheer coincidence, but the fact is such coincidences do happen.
Since no child went missing on the 3 bogus events, and since these events were splattered across 3 different locations in Luz, and sine there was never a hint of burglary or robbery, I ascribe these 3 events as simplistic attempts at a scam, nothing more.