I have used my common sense. If you look at the picture, you say spot 9 is six feet off the ground. If so then imagine a man of six foot standing in that corner - the scale is all wrong. In my house all the windows and doors are at the same height - are they in yours? Most standard doors are around 195cm high, now if the doors and the windows in Apartment 5A were at the same height, then your spot nine is not 180cm off the ground.


May I ask what your estimate is of the height of spot 9? I will be happy to check my estimate if it appears to be seriously off, but I can't stick a 6ft man into the photo.
I used the height of the window sill. The PJ Files show it as 92cm. I estimate the spot to be about double that.
Textusa used the floor tiles to produce a grid up the walls. That estimate, from memory, is lower, but then so is the window sill.
Both of us got a spot that is not explained by a young child standing on the sofa, therefore an alternative explanation is required.
Side note. I see the file name of your first photo ends in blood_spatter_pattern.jpg, which shows why this topic needs a bit of investigation.