On April 15, the Security Service of Ukraine opened a criminal proceeding against "Strelkov". He was described as the leader of the "saboteurs" in Sloviansk, and in March had allegedly coordinated Russian military takeovers of Ukrainian units in Crimea.[4][7] The next day, he allegedly sought to recruit Ukrainian soldiers detained at the entrance to Kramatorsk. There was some indication that he may be connected to sniper attacks on protesters in Kiev.[8][9][10]
During the weekend of April 26–27, the leader of the Donetsk People's Republic ceded control of all separatist fighters in the region to Strelkov.[3] On April 26, Strelkov gave a video interview to the Komsomolskaya Pravda where he said that his militia in Slaviansk was formed in Crimea and comprised of volunteer war veterans (mostly from the Russian Army[11]); it included many Russian and other foreign citizens but was mostly ("more than half, maybe two-thirds"[11]) Ukrainian.[12] He said nothing about his own background, denied receiving weapons or ammunition from Russia,[2][3] and announced that his militia would not release the OSCE observers that it had taken hostage.[13] The Ukrainian government claimed he was behind the kidnapping, torture, and murder of Ukrainian politician Vladimir Rybak and a 19-year-old college student[13] Yuriy Popravka.[5]
On 28 April, the EU sanctioned "Igor Strelkov" as a GRU staff member believed to be a coordinator of armed actions and a security assistant to Crimea's Sergey Aksyonov.[6]
Strelkov was subsequently identified by Ukrainian intellignce as Col. Igor Girkin, registered as a resident of Moscow.[14] Journalists visiting the apartment where his mother allegedly lived were told by neighbors that a "fancy black car" had that morning picked up the woman living there.[2]
On 29 April, he appointed a new police chief for Kramatorsk.[14]