LLuCCiFeR tapescripts of both conversations (starting from entering Ukrainian airpsace till latest calls) and coordinations (starting from Warsaw-Lviv ending with Dnipropetrosk-Rostov) were transferred to commission by UkSatse. Scripts are saved in WAV format, and can't be technically confiscated: as they are stored on different servers at ATC facility and UkSatse main office.
And by the way: there were few other traffic on same frequency, and had conversations at black boxes.