Trump just spotlighted Ross Ulbricht, founder of the online illegal drug marketplace Silk Road. Why he is a hero to some.

The move to highlight Ulbricht was strategically catered to Libertarian voters.

Ulbricht, now 40, who was imprisoned for life in 2015, is an unjustly imprisoned hero of the US libertarian movement.

The Libertarian Party, with its long-standing advocacy for drug legalization and criminal justice reform, has consistently lobbied for Ulbricht’s release, viewing his life sentence as a symbol of government overreach.

Ulbricht became interested in libertarian values at university, according to a Wired report, where he discovered the ideas of Austrian economist Ludwig von Mises, an advocate of the moral purpose of free-market capitalism and staunch opponent of interventionism. Ulbricht embraced these ideas of uncompromised freedom, per Wired.

“When I created Silk Road, I wasn’t seeking financial gain,” Ulbricht’s wrote in a heartfelt letter to his trial judge in 2015.

“I created Silk Road because I believed at the time that people should have the right to buy and sell whatever they wanted so long as they weren’t hurting anyone else,” he wrote.

In 2015, he was given life in prison without the possibility of parole. He was also fined $183,961,921.

Ulbricht is being held at the United States Penitentiary in Tucson.

The majority of goods sold on Silk Road were illegal hardcore drugs, said the United States Attorney’s Office for the Southern District of New York at his trial.

“Silk Road was supposed to be about giving people the freedom to make their own choices, to pursue their own happiness,” wrote Ulbricht. “While I still don’t think people should be denied this right, I never sought to create a site that would provide another avenue for people to feed their addictions.”

Trump, who was loudly booed and heckled during much of his speech at the Libertarian National Convention, did manage to partially win the audience around by committing to free Ulbricht.

Katherine Yeniscavich, a Libertarian Party national committee member, told Politico, “It’s one of the things we wanted from his first term.”

In addition to the Ulbricht pledge, Trump made further pledges, promising to include a Libertarian in his cabinet and others in senior administrative positions if elected.