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Digital Evidence
Wallet files and private keys found on the defendant's laptop
Yum matched laptop wallet addresses to outgoing transfers of 1,670 bitcoins on March 31, 2013, and 3,000 bitcoins on April 8, 2013. He explained that the wallets held the private keys needed to spend bitcoins associated with those addresses.
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Yum connected the sending addresses for both transactions to the laptop wallets, but the exchanges did not identify the person who initiated either transfer.