Shaun Bridges, who is already serving a six-year sentence for nicking Bitcoins from the underground souk, pleaded guilty on Tuesday to stealing a further 1,600 Bitcoin (worth $359,005 at the time and approximately $6.6m today) during a separate investigation.
According to court documents [PDF] Bridges, 35, was probing European Bitcoin trading firm Bitstamp, which led to the US government seizing 1,606,6488 BTC in November 2014. These were transferred into a digital wallet that only Bridges had the access code for.
In March 2015, while under investigation for the Silk Road thefts, Bridges resigned from the Secret Service and in June pleaded guilty to money laundering and obstruction charges. A month later, while still free and awaiting sentencing, he took the Bitcoins seized from Bitstamp and moved them into an account run by the BTC-E exchange.