Russian criminal investigations are conducted by two principal authorities: the Investigative Committee of the Russian Federation (Следственный комитет, SK Rossii) for crimes categorised as serious or especially serious — including fraud under Article 159(4) and tax evasion under Article 199(2) — and the police (Министерство внутренних дел, MVD) for less serious economic crimes. The investigative authority determines the style and pace of the investigation.
The investigation opens with a procedural decision to commence proceedings. This decision can be made by the investigator on the basis of a criminal complaint (заявление) from a private party or public authority, or on the investigator's own initiative following the discovery of evidence of a crime. The opening of an investigation does not require the approval of a court or a prosecutor — it is a unilateral executive decision.
Once the investigation is open, the investigating authority has broad powers: to summon and question witnesses and suspects; to conduct searches of premises and seizure of documents and equipment; to request information from banks, registries, and government authorities; and to apply to the court for interim measures including travel restrictions and pre-trial detention.