According to the department's website, the specialists were helped in this by a photograph in the passport of the deceased.
The investigators noted that "when comparing the head ... with the photograph in the passport, a visual resemblance to a man born in 1989 was established."
At the moment, experts are establishing all the details of the incident.
Earlier it was reported that a criminal case was initiated in St. Petersburg after the discovery of the man's body.
The RIA Novosti agency reported that it was allegedly about the Ukrainian rapper Andy Cartwright. Earlier, a source of the agency in law enforcement said that his wife was detained on suspicion of dismemberment of the musician.