According to Tether's own transparency page [0], there's $30 billion of USD sitting in some random bank, somewhere. No, they haven't told anybody where it is, and they have never released an audit. Yes, they are still delaying the NY Attorney General's investigation [1]. We know that at least $850 million has been seized and lost for good [2]. No, they don't report that on the transparency page.
[0] https://wallet.tether.to/transparency [1] https://mobile.twitter.com/bitcoinlawyer/status/135164200602... [2] https://modernconsensus.com/cryptocurrencies/tether/feds-jus...