The Dutch-led Joint Investigation Team has concluded that flight MH17 was shot down on 17 July 2014 by a missile of the 9M38 series, launched by a BUK-TELAR missile launcher, from farmland in the vicinity of Pervomaiskiy. At that time, the area was controlled by pro-Russian fighters. Read more about the official investigation results here.
In May 2018, investigators of the JIT, leading the official investigation of the death of MH17, presented fragments of a rocket engine with a unique serial number 9032 found at the crash site of Boeing in the Donetsk region. Then, in May, the JIT group asked the Russian side to provide all the data concerning the engine found. Four months later, on September 17 2018, lieutenant-general of artillery Nikolai Parshin and press secretary of the Russian Defense Ministry Igor Konashenkov held their own briefing. They showed several documents mentioning the rocket engine No. 9032. As stated by the generals, on December 26, 1986, an engine with this number was installed in the Buk anti-aircraft missile system with a unique number 8720 and sent to military unit of the 20152 military unit in the Ternopil region in western Ukraine.
Novaya Gazeta noted that in the “restored original form”, the day of the document production is January 14, 1986, while the release of the rocket engine 9032 dated December 26, 1986. This discrepancy generates questions about the authenticity of the "irrefutable evidence".
The ”evidence” provided by Russia is not only fabricated, but also incompatible. In fact, the second presentation of ”proof” by the Russian Defence Ministry even debunked their first batch of ”evidence”. For further information see here. Another case of faked "evidence" was the infamous Carlos-case.
Recurring competing and contradictory stories promoted by Russian state-controlled media on MH17. Read more here.