Alexander Kolchak
After Yekaterinburg fell to the anti-communist White Army on 25 July, Admiral Alexander Kolchak established the Sokolov Commission to investigate the murders at the end of that month. , a legal investigator for the Omsk Regional Court, was appointed to undertake this. He interviewed several members of the Romanov entourage in February 1919, notably Pierre Gilliard, Alexandra Tegleva and Sydney Gibbes.