A glimpse into a high-security Russian prison housing serial killers ... The high-security Black Dolphin prison houses the country’s most brutal criminals including serial killers, cannibals ...

Inside the four dank walls of Russia’s notorious Black Dolphin Prison reside some of the most ... He confessed to 81 rapes and murders. Russian media called the former cop “The Werewolf.” ...

Russian prisons are notoriously tough, but there's one that's even harder than the rest. Called Black Dolphin, this high-security prison on the Kazakhstan border houses the country's most brutal ...

Russian prisons are notoriously tough, but there's one that's even harder than the rest. Called Black Dolphin, this high security prison on the Kazakhstan border houses the country's most brutal ...