"In relation to the head of the investigation department of the Investigative Committee of Russia in the Tyumen region, Alexander Kublyakov, an official check has been appointed," TASS quotes her.
Earlier it was reported that Vitaly Berezhnoy, detained on suspicion of the murder of Muravyova in Tyumen, confessed to the crime.
On August 25, it became known that investigators are checking a 40-year-old resident of Tyumen for involvement in the murder of a missing girl.
Later, experts found a DNA match of the detainee in the murder of a girl in Tyumen with samples that were found on her body.
The schoolgirl went missing on June 30, her body with signs of violent death was found on August 19.