The dialogue between Russia and the West is limited to sanctions, pressure, threats and isolation. It is directed by Lenin’s principle “one step forward, two steps backward”.
Suddenly, accusations appeared that the two Skripal poisoning suspects are not businessmen Boshirov and Petrov (as was the Russian version), but GRU agents Chepiga and Mishkin. But is there any evidence of that? There is none.
Bellingcat and The Insider provided an overwhelming amount of evidence including documents, photos, and even disclosing the whole process how they verified Chepiga's and Mishkin's identity. See e.g. https://www.bellingcat.com/news/uk-and-europe/2018/10/09/full-report-skripal-poisoning-suspect-dr-alexander-mishkin-hero-russia/ or https://www.bellingcat.com/news/uk-and-europe/2018/10/02/anatoliy-chepiga-hero-russia-writing-wall/
Their findings were confirmed by other outlets, mostly via testimonies of the GRU agents' friends and family members, see e.g. https://www.washingtonpost.com/world/europe/in-russias-far-east-villagers-recognize-a-skripal-poisoning-suspect/2018/09/28/689bc13e-c303-11e8-97a5-ab1e46bb3bc7_story.html?noredirect=on&utm_term=.1adf3146c096 or https://www.washingtonpost.com/world/europe/russian-suspect-in-uk-poisoning-is-hero-to-his-home-village/2018/10/10/c2529356-ccbd-11e8-ad0a-0e01efba3cc1_story.html?utm_term=.004060e1592b