Investigation, Supplementary

in Soviet criminal procedure, a supplementary preliminary investigation or inquiry, on the instruction of the procurator or court, in a case in which the investigation has already been completed. Supplementary investigation is conducted in the event of: the discovery by the procurator or court that the investigation is incomplete and cannot be completed during the court session; serious violation of the code of criminal procedure during the investigation of a case; the existence of grounds for presenting to the accused another accusation connected with the one already presented or for changing the accusation to a more grave one or one differing substantially in factual circumstances from the accusation that was presented earlier; the existence of grounds for instituting criminal proceedings in a given case against other persons when it is impossible to separate the materials concerning them into a new case; the incorrect joinder or disjoinder of cases.