Yevgeniy Aleksandrovich Nikulin, a 29-year-old Russian national, is accused of allegedly hacking not just LinkedIn, but also Dropbox and Formspring. Nikulin was arrested in Prague on October 5 by the Czech police after Interpol issued an international arrest warrant against him. The United States has requested Nikulin extradition for carrying out hacking attacks and stealing information from several U.S. social networking companies, including LinkedIn, Dropbox. Russia has requested his extradition on a separate cyber theft charge of stealing $3,450 via the Internet in 2009.
Source: https://thehackernews.com/2017/05/linkedin-russian-hacker-extradition.html