SOURCES: 

'People could be charged': Social media rumors about Moscow case leading to doxxing, harassment | The Spokesman-Review

From Russia with Blood: The Kremlin's Ruthless Assassination Program and Vladimir Putin's Secret War on the West

Boris Berezovsky: An Oligarch Dies | The New Yorker

New probe into death of Scottish property tycoon amid fears hitmen threw him out window - Daily Record

Property tycoon dies in fall under Tube in haunting echo of royal polo friend’s suicide | London Evening Standard

Millionaire Scot Young found dead impaled on railings was 'go-to fixer for Russian mob' | The US Sun

Michelle Young: 'I’m not a victim. I want to come across as powerful’ | London Evening Standard

Jailed property man hid his assets in offshore network during divorce | Tax avoidance | The Guardian

Alexander Litvinenko: Profile of murdered Russian spy - BBC News

Jailed Property Man Hid Assets Offshore During Divorce - ICIJ

Murder of a Former K.G.B. Agent | The New Yorker

Scot Young's daughter opens up about his fatal balcony fall saying he was MURDERED by Russian mafia | Daily Mail Online