I'm not being hopelessly naive. It's certainly possible that they took it down with the explicit intention of hiding information on the internet, but that would also be pretty stupid, since various articles
have found the reports on other government servers. So I assume incompetence before malice.
What's already known is that they fired the staff who prepared the report, and are presumably shutting down the agency. Is it really surprising that someone might have turned off the webserver before transferring the domain?