The French cult couple has been found on the farm in Sutherland and has died in a shootout with police. Here is CyberShrink's commentary on the situation before they were found, and on just why cults are so dangerous.
What could happen when they are found?
As they left hurriedly without special preparation (as far as we know) they may be low on ammunition. When they become aware that police are approaching, they surely realise that having shot two policemen means the authorities will not give up in pursuing them. They may choose to fight to the death, but they may well choose to use their remaining ammunition to kill themselves. This could be especially acceptable if they believe the view of their cult, namely that the world will end, anyway, next year.