Unequal Prison Treatment

Paul Bernardo is locked up in a 2.5m x 1.5m cell, 23 hours a day, 365 days a week for his own protection, otherwise other inmates (who view sex offenders who prey on children the worst of the worst) will try to injure or kill him. So why was Karla Homolka, an equally vile felon, able to walk about her medium-security prison unharmed? It's a conundrum.