except most rapist don't take a partner along with them....the few I have read about that took them with the help of a partner kept them alive for years..... two cases that I could list in the US but I won't because they have been through enough JMO
This was the first time this murderous couple committed the crime they did. Neither had a location to hold a victim for 2 years, let alone 2 days. That doesn't mean that they are not a murderous couple.