Do not try to build a risky project by yourself (without hiring someone to be in control) if you do not know how to deal with it fully. He basically was studying physics in university and decided to create a site(with tor onion network) where people can sell anything(mostly drugs) that does not harm people like gun anonymously(no tracing back to the people). But as he was just starting out, he made a lot simple mistakes which FBI used to find and arrest him. As Donald Trump found punishment was too harsh, he decided to pardon him

https://www.youtube.com/watch?v=gi-wuoIDdjw (Short video)