In Russia the main intrigue is why Ms Vasilyeva, who got her legal qualifications only in 2009 after working as a cook (among other jobs), chose to spill the beans.

ECONOMIST: The Khodorkovsky case

You can see why HS2 adds yet another element of intrigue to the proceedings.

BBC: HS2 spells double trouble in next week's council poll

The nature of his work and questions around why his spy agency bosses took so long to raise an alert about his absence have added to the intrigue surrounding his death.

CNN: STORY HIGHLIGHTS