"The investigation is constantly under run. The results of the expertise will be greatly benefit the investigation," added Piskun, Interfax-Ukraine reported.
According to his words, Ukrainian General Office of Public Prosecutor gathered the necessary documents and material evidences for the expertise. It will be carried out by Ukrainian, Swiss, German and Dutch experts.
The main targets of the expertise are following: the kind of poison, the place of poisoning and the time of it. "As soon as the expertise will be done the suspected persons will be known for sure," said Piskun.
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