Fintech

How a $500 Walmart gift card helped investigators track a $4.5bn bitcoin heist

New forensic techniques led agents to a suspect crypto couple after untangling a complex web of transactions

Federal investigators spent years hunting for clues in the 2016 hacking of the Bitfinex cryptocurrency exchange, when thieves stole bitcoin now worth $4.5bn.

In the end, what helped lead them to two suspects was something much more quotidian: a $500 Walmart gift card.

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