The two culprits were GRU officers according to this investigation https://www.bellingcat.com/news/uk-and-europe/2018/10/09/full-report-skripal-poisoning-suspe

The two culprits were GRU officers according to this investigation https://www.bellingcat.com/news/uk-and-europe/2018/10/09/full-report-skripal-poisoning-suspect-dr-alexander-mishkin-hero-russia/ https://www.bellingcat.com/news/uk-and-europe/2018/10/09/ful...