Several concurrent investigations test Viktor's friendship with the Sniffer, some of which bear these features: a missing quadriplegic, criminal malpractice, a missing finger, "ghost" men and a 1980s children's show.

• Artem Litvinenko
• Artyom Litvinenko
• Andrey Babik

• Anastasiya Makeyeva
• Ivan Oganesyan
• Kirill Käro