Vitaly Nayda, Ukraine’s director of informational security, tells CNN it was a “Russian-trained, well-equipped, well-educated officer” who “pushed that button deliberately.” He also says Ukrainian intelligence supports his assertion. He refers to audio recordings captured by Ukrainian intelligence:
We taped conversations between a Russian officer and his office in Moscow. We know for sure that several minutes before the missile was launched, there was a report to a Russian officer that the plane was coming…They knew the plane was coming with constant speed, in constant direction…and should have known it was not a fighter jet but a big civilian plane
Moscow denies these claims and is suggesting a Ukrainian jet fighter may have shot the plane down.