The U.S. Marshal has announced on their website that on March 19th, 2018 from 8am until 2pm they will hold an online auction where they are selling approximately 2,170 BTC. The Bitcoin in their possession were forfeited in various federal criminal, civil and administrative cases. Bids will be accepted by email from registered participants. Unfortunately they require a $200,000 deposit when registering, making it very hard for common retail investors to participate.
If you are interested you can find more info from the links below: