Doubtful. Usually those types of displays are fish-only (no LR, no inverts). Even if there were inverts, a 25,000 gallon tank would take some serious effort to foul suddenly like that.
Stuff like this happens at public aquariums more than you'd think. It's pretty sad. Some are just honest mistakes that can really happen to anybody. Others are blatant negligence.
Just following
http://www.advancedaquarist.com/blog/update-on-texas-aquarium-tragedy">http://www.advancedaquarist.com/blog/update-on-texas-aquarium-tragedy</a>
Because any preliminary judgment shouldn't be negative