Yes, even the coverup seems premeditated. The last image on the camera was him sitting on the couch with the baby before he removed the memory card around 1:20 am.It wouldn't surprise me if he removed the window before he killed Caroline too. Two and a half hours before the murder he had removed the camera card and destroyed it.
After he completed the murder, he moved on to hanging the dog in 9 minutes, and then had two hours to complete the rest of the staging before he called police.
In two hours he -
thought of everything he now needed to stage and what his story would be, where the money was hidden, what the robbers and their guns looked like, how the robbers had dealt with each of them, how he would use his phone to call out, he wouldn't have time to dream this up after police got there,
tied Caroline's hands behind her
ransacked parts of the house
hid the rings (other jewellery?)
probably deleted his argument/texts with Caroline on her phone and his own over that night and going back many weeks too,
removed the window
moved the baby onto Caroline (for unexplained reasons)
bound his head and tied himself up
It seems to me he raced around completing this with a plan already devised. A window should surely be difficult to remove, and would normally take a workman that amount of time all by itself with a lot of effort to loosen it and break the cement without being able to bang it with a sledgehammer. I don't know, maybe windows are less secure in Greece.
Caroline reportedly tried to book a hotel room around 12:37 am, and they had been arguing before that. If Caroline was sleeping for a couple of hours before he returned upstairs to smother her, then he had time enough to think of a plan. Maybe he even removed the screws and the window beforehand.
Another thing that is significant about the timeframe is that it shows there was a "cooling off" period between the time the argument started and the time of the murder. His claim that he acted in a fit of rage doesn't "fit."
IMO