And your evidence is a BBC statement.
From your BBC link:
"A Ukrainian military pilot blamed by Russia over the 2014 downing of Malaysian Airlines flight MH17 has killed himself, Ukrainian media report, quoting police.
Capt Vladyslav Voloshyn had called the Russian allegation a lie. Dutch investigators concluded that a Russian Buk missile had destroyed the Boeing 777 jet, killing 298 people.
Reports say Voloshyn shot himself at home in Mykolaiv, near the Black Sea.
Ukraine described him as a war hero."
The BBC seem to be unaware that the reported proof is from Uke media, who quote Uke police.
The BBC also seem to be unaware the other countries have/do own BUK missiles. Some including Ukraine, manufacture Buk missiles. The "Russian" missile shown as evidence, at the Dutch report event, was a 10+ years old model and was no longer in Russian military arsenal at the time of the plane cram due to all 10+ year old BUK missiles being scrapped/superceded by Russia.
However other countries are "highly likely" to utilise the old design and produce them, due to them not receiving newer models from Russia.