Comment by smsm42

The obvious solution for this conundrum is that they did study it, but didn't publish it because the screw-up happened and all evidence was promptly destroyed. In a totalitarian state, the secrecy is the default mode. You can get exceptions and publish stuff, sure, but only once you asked and received permission. If you didn't - or in the period between you asking and permission being issued something happened - no evidence will be seen by anybody.