I suppose it would be too much to hope he can be charged with rape in Russia. Even if there’s no way to charge him criminally, hopefully the survivors can sue him into penury so he can’t live in comfort for the rest of his life.
Thing about rapists, like most murderers they rarely only commit the crime once; it’s usually a pattern of behavior. Statistically they almost always have multiple victims. They don’t wake up a different person the day they commit the crime.