We are told that the FFM already took some biomedical samples, which were analysed and revealed the presence of sarin. Moreover, they say that the results of this investigation are final and not subject to any doubt. But let me ask you where, how and when were these samples taken? Was the chain of custody, established by the OPCW itself, complied with when safekeeping the evidence? It would be good to receive answers to these questions, especially since the mission, as we know, has never gone to Syria. I’m asking these questions for a reason. In my remarks on April 13, I already said that the Russian military, who collected the materials testifying to the use of chemical weapons in Aleppo, are being forced to bend over backwards trying to explain how they found the fragments of ammunition, to whom they reported and even asking them to present some obscure logbooks. They kept asking us about this during a special video conference, and posed an ever greater number of questions during a meeting on the sidelines of the Executive Council. And this in spite of the fact that our specialists already have a pretty much clear general picture of what actually happened there. Still, four months later, the FFM has not yet come up with any conclusions. I emphasise that they have been analysing this for four months and are still unable to come with any conclusions. Then here, all of a sudden we see such incredible efficiency and conclusions that are not subject to any doubt. So, think for yourselves why we are insisting that the results of a full-fledged comprehensive investigation should inspire confidence not only to a group of Western countries, but to all other states as well.~ Ambassador Alexander Shulgin, Permanent Representative of the Russian Federation to the OPCW, April 19(?), 2017.
The fact that the delegations of some countries, primarily from the Western group, are always shying away from accepting the decisions proposed by us and the Iranians suggests that they are, in fact, not interested in establishing the truth.
 "Russia Responds After US Blocks Inspection of Syrian Air Base. US 'blocked a decision aimed at a prompt initiation of a mission to find out what really happened in Khan Sheikhun', according Russia's OPCW Ambassador Alexander Shulgin." By RI Staff, Russia Insider, 4/23/17.