Last week reports appeared online that the Ukrainian Security Service (SBU) arrested Ukrainian citizen Volodymyr Borysovich Tsemakh (b. 04.07.1961) in connection to the 2014 downing of Malaysian Airlines Flight 17 (MH17). Tsemakh was previously known to have been the commander of an air defense unit in Snizhne, the town nearest to the Buk missile launch site. Tsemakh had not been publicly linked to the events surrounding the downing of MH17 before and was also not mentioned in our recent report about the separatists connected to the downing of MH17. However, newly-surfaced footage has revealed that he was, at a minimum, an important eyewitness to these events.
Murder In The Sky: Malaysia Airlines Flight MH17
Bellingcat: Arrest of Tsemakh and its implications for MH17 investigation

Volodymyr Tsemakh, a Ukrainian man who was arrested on June 28, allegedly in connection to the downing of MH17 in 2014.