to be the basis for charge. Therefore the investigator needs to gain not "recognition", and truthful indications, that is to find out actual data, fully and objectively reflecting valid facts of the case.
Reliability of testimony is influenced by a number of factors, for example, the personal relations with the suspect (accused) existence of the circumstances to some extent compromising witnesses. The investigator should find out nature of relationship of the witness about the accused, his possible participation in acts of the last and to take measures to the prevention and exposure of perjury. Formation of testimony is influenced also by the objective factors complicating perception of the facts and events (it can be adverse weather conditions, insufficient illumination on