Security Measures

We have now been burgled twice in the last 3 weeks. Second time was when they came through a locked window (again) in the lounge on Friday night. Alison discovered the break-in when she went to let Tia out around 0530 (again). Again the police were there within 15 mins, very sympathetic, could even spell our names without asking. This time we lost my work bag, with a load of gadgets, and, even worse passports and various I.D papers which were in there as I have the annual struggle to get my Work Visa renewed.
Now these windows have five interior anchor points and are supposed to be very difficult to force so I called the people who installed them to come and explain why a thief seemed to be able to get into our house at will and what, exactly, the point of locking them was in that case. Although they couldn't explain the break-ins (they kept repeating that this type of window was "safe" even the evidence in front of their eyes proved otherwise) they did come up with an added security level to prevent this type of window (the open-and-tilt kind) being compromised again. So on Saturday they added bolts (see pics) to 7 downstairs windows and 6 upstairs (the ones accessible from terraces and roofs). Not an elegant solution but practical. But we weren't happy with not knowing why these supposedly safe windows were being opened. We were going to speak to a different company but, by chance, we had here a chap who knows about these things, Charlie from Manchester, and I saw him for a beer on Friday night. On Saturday he dropped by and told me that:
In principle this type of window IS difficult to break into BUT
If there is too much of a gap between the "window" and the casing
AND/OR the metal anchor points on the inside of the casing are not accurately placed to be at the end of the travel of the pin in locked position
AND/OR the pins themselves are not long enough (very possible when the window is slightly too small for the casing) to sit deep into the anchor (the best type are the ones where the pin has a nail-head end which slides into and under the anchor point)
THEN (someone who knows what they are doing) can force the window over the anchor points and "crack" it open. The level of inaccuracy required between the window being a snug fit in the casing and being "crackable" is measurable in millimetres.
We are not the only victims of burglary. Ours (the second) is the 12th we know about in the last 2 weeks. And as the methods are different (in one case, scarily, a gun was brandished) there must be more than one team. Some house have had laptops and the like stolen. But from our house only wallets and small items went and, seeing as though our thief has now had 2 chances to steal 2 laptops (both were in plain view) we assume that he only wants cash and small items. This makes me think that he has no transport and/or he sleeps in dorm room accommodation where a large haul would be difficult to conceal from his colleagues. Seeing as though both the building season proper, and the tidying up time, are passed but there is still construction going on means that most people suspect workers who have to go home to the east (be that Antalya, Konya or Batman) soon of wanting to "bag" one last "present". Another pointer to it being someone in the construction indusrty is the fact that you would have to know quite a lot about these windows to know their potential vulnerabilities.
We have also added signs warning about the Terrible Tia, enough to scare the most hardened criminal. AND we're fully alarmed since Saturday inside the house. This week I shall investigate security cameras (the cables are already in place).