Hear expert's theory on why oligarchs are reluctant to pressure Putin

The UK government has claimed up to 60% of what it calls "ill-gotten" Russian gains and foreign reserves have been frozen and that there will soon be nowhere left for such money to hide. But as Nina dos Santos reports, sanctions on the super rich have yet to sway public allegiances, perhaps why the US has now announced the first criminal charges against a Russian oligarch and extended sanctions to Putin's two eldest daughters. CNN's Nina dos Santos reports.