Are you sure it's 600K coins? that's almost 3% of all bitcoin.
100%, multiple articles. Ill dig one up
heres what it says--I dont know what the commissions thing means, not my area
How many bitcoin did FBI seize from Silk Road?
Mr. Ulbricht, who operated Silk Road between 2011 and 2013, accepted bitcoin as a payment on his website. When federal officials arrested him in October 2013, they seized about 175,000 bitcoins but estimated that the website had generated commissions totaling more than 600,000 bitcoins.Nov. 5, 2020