Contradictory reports on cause of death as Colin Madsen's remains found in snow in mountainous region of Republic of Buryatia.
Tigre de Cristal under fire for 'abusing' rare big cat to promote gambling revolution.
The Russian-registered vessel sent out Mayday signals on Sunday morning sparking a huge search and rescue operation in stormy weather conditions.
More than 40 wounded from the accident.
The freighter Amurskaya disappeared in stormy weather on Sunday after sending Mayday signals which were picked up by coastguards.
Private helicopter brought in to located Tyva Avia aircraft that had 13 people on board in remote Siberia.
Rangers in Yakutia are on a lookout after watching a video showing a failed rescue attempt.