A jury convicted a 22-year-old New York man named Cheng Le yesterday of attempting to buy the deadly poison ricin on a darknet marketplace called Evolution, according to Reuters. Reaching its verdict yesterday afternoon after a four-day trial, the jury found Le guilty of attempting to possess a biological toxin for use as a weapon, and two other counts. He faces up to life in prison.

Le, operating online under the moniker "WhenInDoubt," allegedly tried to buy the toxin from a vendor who was actually an FBI agent. Asked about his plans, Le said he planned to sell the ricin as "simple and easy death pills," according to prosecutors. The FBI sent him fake ricin, along with castor bean seeds, which are used to make the poison.

Le's lawyer argued there was no proof that he was the one who actually made the ricin purchase, but the jury disagreed.

Prosecutors said that in messages to the FBI-controlled "dark_mart" account, Le wrote, "After all, it is death itself we're selling here, and the more risk-free, the more efficient we can make it, the better."

A search of Le's apartment found the fake ricin and the seeds, the FBI said. Le's computer was still logged on to the website.

Evolution was widely considered the most popular darknet marketplace following the fall of Silk Road in late 2013. Unlike Silk Road, Evolution's administrators were more open to trafficking in weapons and deadly substances like ricin. Evolution vanished from the Web in March of this year. Users of the market believed owners pulled off an "exit scam," taking the millions of dollars' worth of Bitcoin that was in the site's escrow system.