Caution: Merely for the other nosy ones here with time and curiosity to spare for this truly sad disaster,
who don't mind getting themselves down into the nitty-gritty of a huge problem complex:

"INTELLIGENT WORK FORUMS FOR ENGINEERING PROFESSIONALS": https://www.eng-tips.com/viewthread.cfm?qid=484717
[Engineers Unleashed: Caveats: Text-, Drawings- and Jargon-dense forum with thorough and intense discussions ]

"Building Integrity", a YT channel by a Consultant Structural Engineer, Josh Porter of SW Fla, reasoning on possible causes,
consequences and the ongoing forensic investigation (app daily updates):