Dutch lawyer Alex van der Zwaan, the son-in-law of Russian oligarch German Kahn, was sentenced Tuesday to 30 days in prison and must pay a $20,000 fine for lying to federal investigators about his contacts with senior Trump campaign official Rick Gates as part of Special Counsel Robert Mueller's probe. Van der Zwaan, 33, received the first sentence in Mueller’s investigation into Russian meddling and potential collusion with Trump campaign associates during the 2016 presidential election.