President Donald Trump on Tuesday signed a full and unconditional pardon of Ross Ulbricht, the founder of the anonymous marketplace website Silk Road, which the president promised to do on the campaign trail “on day one.”

“I just called the mother of Ross William Ulbright to let her know that in honor of her and the Libertarian Movement, which supported me so strongly, it was my pleasure to have just signed a full and unconditional pardon of her son, Ross,” Trump wrote in a social media post on Tuesday. “The scum that worked to convict him were some of the same lunatics who were involved in the modern day weaponization of government against me. He was given two life sentences, plus 40 years. Ridiculous!”

Ulbricht was convicted because his website, which was founded in 2011 and used cryptocurrency for payments, was used to sell illegal drugs, even though he did not sell any of the illicit substances himself.