@Justin R., I am so sorry to hear that you were a victim of this terrible scheme. Here in Indiana, we have had recent cases where clients lost very large sums of money (6+ figure sums) and it appears that the funds are unrecoverable.
I am a full-time Realtor and my company uses a 2-step identity verification system within our email. And several of the title companies that I use the most have begun sending everything via encryption services.
This topic was discussed as recently as yesterday at our local sales meeting and we were all advised again to verify all critical data points via telephone before proceeding with anything pertaining to the transfer of funds.
It is truly hair-raising to hear how sophisticated these thieves have become and I am so very sorry that you were damaged in this way. Best of luck to you as you pursue a resolution!
(P.S. I would personally kick these pieces of sh*ts *sses on your behalf if I could.)