[Rebelgecko]

All transactions are public on the Bitcoin blockchain. I haven't followed the wallets, but it's possible that they tried to cash out on an exchange and got caught. Or they were initially found via other means and a search of their computers found the corresponding wallet.dat files.

[banana_giraffe]

Yeah, they used Coinbase, and Coinbase is of course willing to respond to warrants.

[techntoke]

Which would likely be encrypted