Or perhaps it was so dark that he didn't bother taking photographs knowing that a full forensic search was going ahead and the apartment was being locked with a GNR officer left outside.
Having been in these situations myself, you think I should have played around with the digital camera myself and got to know it like the back of my hand, but for some reason I didn't.
I got better in the end but taking shots at night or in the bright sunlight could be difficult.
If they both thought "Oh well we'll leave till tomorrow", some important points could easily be missed. One GNR officer could only observe one side of the building at any one time, so if you had been working in tricky situations, like I have, you might have some observation on this side but on the other side of the building there could be people moving things away.
Think of prison officers etc how much difficulty they have at controlling inmates. Police officers at a scene of a crime also, there would be people shifting things to hide evidence all the time (opinion). You need enough staff to control it.