 High-ranking GRU officer Denis Vyacheslavovich Sergeev (alias Sergei Fedotov) has been identified by British authorities as the commander of the team that poisoned Skripal.Unit 29155 was linked by the investigative Bellingcat website to the attempted assassinations of Bulgarian arms dealer Emilian Gebrev in April 2015 and the former GRU Colonel Sergei Skripal in March 2018, both possibly overseen by the same agent.It has also been implicated in the recent Catalan independence movement.