Last Thursday morning I was standing just inches away from the caged Vladimir Tsemakh in courtroom 0307 of the Kiev Appellate Court, as Ukrainian reporters shouted random, pointless questions at him through the metal bars. He didn’t answer any of them, he looked impatient for the charade to be over. Sure enough, minutes later three judges returned from an indecently brief — and clearly unnecessary — consideration break, and read their pre-planned verdict to release the sole captured suspect in the MH17 case “on his own recognizance.” As the reporters, following a collective gasp, began shouting the news down their phones, I watched Tsemakh's face. He was not surprised, he had expected the outcome. He didn’t look overwhelmed with joy either. He knew he would not really be freed, but rather ushered away and kept in custody until the prisoner swap on Saturday. He also knew that after the swap, he would not be free either. He would simply be traded by one country that prized him as a witness, to another country that prizes him as a non-witness. When Tsemakh was captured in June, drunk in his home in Donbass, and renditioned to Kiev in a daring joint operation by Ukrainian security service and military intelligence commandos, few expected that Ukraine would even consider letting him go in a prisoner swap. Ukraine had charged him with at least four murders during his stint as an anti-aircraft unit commander for the separatist Donetsk People’s Republic (DNR). One Ukrainian commando died in the rendition mission when he stepped on a landmine, and another was left disabled for life.

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But the thing that gave Tsemakh global notoriety — and made him an unthinkable candidate for release — was his own admission on camera in a boastful 2015 interview that he had helped hide the BUK anti-aircraft system that shot down MH17. In his version of events, it shot at a Ukrainian military plane, which was allegedly flying at the same time and the same place. Russia has denied that such a plane existed. Yet, by late August it became known that the Ukrainian government had agreed, in principle, to include Tsemakh in the long-anticipated swap of prisoners. Russia had offered to accelerate the timing of the exchange, and even included filmmaker Oleg Sentsov on the list, but only on the last-minute condition that Ukraine would hand over Tsemakh. What’s more, Russia appeared to suggest that the whole deal would be off the table if Tsemakh was not part of the exchange. Despite objections by Ukrainian intelligence services and pleas by the member governments of the Joint Investigation Team (JIT) pursuing the MH17 criminal inquiry, Ukraine’s president Volodymyr Zelenskiy chose to buy what looked like Russia’s bluff. Even the last-minute reported change of Tsemakh’s status from witness to suspect in the MH17 investigation was not enough to tip the balance. As my colleagues and I wrote in July, Tsemakh’s arrest had offered an unexpected boon for the MH17 investigation. Not so much in terms of additional evidence, of which, by all accounts, there is more than enough, and only a fraction of it will have been made public before the Dutch courts start deliberating next March. Tsemkah’s appearance before the court — whether as a voluntary witness under a potential non-prosecution deal with Ukraine’s prosecutors — or as an indicted accessory, would have given an extra layer of legitimacy to the court proceedings.