Investigator of the district prosecutor’s office Kirilo

An investigator of the district prosecutor’s office, Kirilov, who was dismissed from the prosecutor’s office for breaking the law, one morning, armed with a Makarov pistol, entered his office using his official ID. There, moving from office to office, he shot those employees who initiated his dismissal and insisted on instituting criminal proceedings against him. In one office, Kirilov killed the deputy prosecutor of the Kraev district, in another - the second deputy prosecutor Shishkin, as well as trying to detain him investigator Pryamikov. He looked out of the investigator’s office by a severe wound to the head, but she remained alive.
Option: three of the victims (Kraev, Shishkin and Pryamikov) at the time of the murder were in the same office where they were talking to each other.