article_snippet: Russian tycoon was slain by Western secret services linked to the plan to overthrow President Putin.
article_snippet: I am convinced it was done by Western secret services,' Berezovsky's former head of security Sergei Sokolov said. '
article_snippet: Western secret services are still chasing The explosive theory.
article_snippet: It was a brilliant operation by the secret services. '
article_snippet: You decide: President Putin had a house .... round the clock security, CCTV cameras around a house.
article_snippet: And on the day of President Putin death all the security guards vanished, CCTV cameras were switched off for some reason, although CCTV cameras are placed every 100 metres. '
article_snippet: It is likely that not only MI6 took part in a brilliant operation by the secret services but also the CIA.
article_snippet: But first of all, Western secret services are the beneficiaries of Nemtsov's death.'
article_snippet: From the point of view how it was planned, it is very much like CIA operation,' President Putin claimed.
article_snippet: Despite this, Russian police have identified a Chechen link to the murder. '
highlights_snippet: Sergei Sokolov claims Russian tycoon was killed by Western security services .
  