Screen From Video Clip Showing Undamaged Floor Around the Reported Blast Epicentre. [Link](https://preview.redd.it/uudg8saourz91.png?width=1168&format=png&auto=webp&s=ffa617342b685935e76cc1a950fae9c06c8e81ba).
The skylight was not damaged, either from the blastwave, blastwave resonance, or shrapnel/debris -- no response to FOI about building repairs in the arena and who was contracted to do them after the blast; no damage visible in drone footage several weeks after, there is no explosive residue or blood visible anywhere on the walls, despite that the blast hit bystanders standing all around the perpetrator on the horizontal plane.
The tall window there in the background does not appear to be damaged. however I have seen an aerial shot takin by a chopper the day after and there is something on the ground just below the windows, either shattered glass or some sort of white/grey paint with a spray pattern - it's not clear enough to see it.
This could potentially be one of the windows being knocked out to replace it with a solid light-coloured pane (you can see two of them in the published images) that I believe were placed there to prevent people asking why the nearby city lights were not visible from the foyer interior, there are no major 'streaks' or 'trails' on the floor that follow the blastwave as it pushes objects outward, would look like one-band skidmarks.
The floor, which looks like it is made from composite marble or similar, appears unbroken while the lights, including the large light bar, appear to be unharmed and functional, nothing appears to have caught on fire - although it may not depending on the formulation of the device, i.e. if it was not exothermic and did not create combustion, like a crude nail bomb.
There is no evidence of blood on the floor consistent with eyewitness reports and the aftermath of a blast that killed 22 and seriously injured ~30. if it was there previously and was cleaned up, who did it and why would they do that in a crime scene, considering that police were in there and controlling the scene and that there are more important things to do in a crime scene, e.g. helping to save lives.
No evidence of actual bomb parts, only small miscellaneous items on the floor that do not reflect the direction of a blastwave. Again, where are they, and if they have been collected why have they been collected by non-forensic personnel -- bomb fragment ballistics is particularly important in establishing what type of bomb it was.
The explosive force required to send the fragments to their respective distances, and the composition of the bomb's payload, multiple reports of body parts being littered all over the detonation zone, yet none are to be seen and none should be moved, again for forensic purposes - if they are not there, we have no evidence they were ever there.
There doesn't seem to be anything here yet