[Boudica]

Unless they're saying someone other than the builders are responsible for the collapse

Yes, sabotage Is certainly not out of the question.

I'd be doubtful, but if someone decided to knock a few walls down or compromise the structure, 150+ people is more than any mass shooting claimed. It is still strange that the cause of collapse has not been revealed.

This I find really odd. A building doesn't just suddenly collapse for no real reason. Surely they can see if it was a sinkhole/poor structure/or an intentional attack on the structure? Perhaps they're waiting for confirmation of their suspicions before they say anything publicly.

I did read on this article that a previous review found the building was sinking very slightly over time, as it was built on a previous wetlands area. I suspect they're just going to find that there was a sinkhole or earth shift that caused it.

Code:

A study from researchers at Florida International University published last year found that the building had been sinking at a rate of two millimetres per year in the 1990s, which may have affected the building structurally.

But the author has cautioned that the study was just a snapshot in time. The building was constructed on reclaimed wetland, which experts say is always of concern as the land underneath can compact over time, leading to shifts.

On the sinking, the author of the study, Prof Shimon Wdowinski, told the Miami Herald newspaper: "We've seen much higher than that, but it stood out because most of the area was stable and showed no subsidence."

Prof Wdowinski said the research is not meant to suggest certainty about the latest incident.