Jonathan Spalletta exploited coding flaws in a decentralized exchange to steal more than $50 million, then left prosecutors a physical trail measured in rare trading cards, ancient coins, and moon-touched fabric.

A federal jury in Manhattan convicted Jonathan Spalletta, 36, of Rockville, Maryland, on one count of computer fraud and one count of money laundering after a six-day trial before U.S. District Judge Jed S. Rakoff. Prosecutors said he drained more than $50 million from the Uranium Finance cryptocurrency exchange.

He then used part of those proceeds to buy a $601,545 Roman coin, a $500,000 Magic: The Gathering card, and a $750,000 Pokémon base set.

Uranium Finance was a decentralized exchange, meaning it operated through…