TY JOUR TI INCREASING EFFICIENCY OF CRIMINAL-PROCEDURAL AND OPERATIVE-DETECTIVE ACTIVITY AT THE STAGE OF CHECKING THE CRIME REPORT IN THE CONTEXT OF TOPICAL ISSUES OF THEORY AND PRACTICE KW investigative actions KW procedural actions KW operative-detective actions KW investigator KW interrogator KW an operative KW mutual (cooperative) activity JO Volgograd Academy of the Ministry of the Interior of Russia AU , .. PY 2018 IS PB Volgograd Academy of the Ministry of Internal Affairs of Russia