Znak.com: the reason for the shooting at the MFC could have been a conflict between Sergei Glazov and the State Budgetary Institution Zhilishnik 
Sergei Glazov opened fire in the Moscow MFC, there could be a conflict with the State Budgetary Institution Zhilischnik of the Ryazan region. This became known to the Znak.com edition from a source in the Ministry of Internal Affairs.
According to the interlocutor of the edition, the conflict began due to the fact that the sewer pipes were blocked for Glazov. “Zhilischnik has had such a tactic for a long time – a person does not pay for a communal apartment for one or two months, the risers are blocked for him, a person simply cannot flush in the toilet,” he said. According to the source, there are several similar plugs on the sewer risers in this house. At the moment, operatives are checking the house where the shooter lived.
Earlier, the shooter's mother told about him and called him calm. According to her, the man graduated from the military academy, rose to the rank of lieutenant colonel. After that he was sent to Malaysia, where he stayed for over a year. He returned from a business trip in 2009 and immediately wanted to leave the army. Recently he lived alone.
The shooting at the MFC on 1st Novokuzminskaya Street took place in the afternoon on December 7. Retired Lieutenant Colonel Sergei Glazov came into conflict with the center guard over a mask. Then he took out a weapon and opened fire. As a result of the incident, two people died, four more, including a 10-year-old child, were injured. The attacker was detained. A criminal case was initiated under article 105 of the Criminal Code of the Russian Federation (“Murder of two or more persons”).