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>Lisanne Froon, 22. Picture taken on april 1, the day of her disappearance. Cellphone data, found in their backpack, revealed that attempts to dial 911 were made some 2 hours after this photo was taken. There was no reception. The last attempt to dial 911 was 10 days after their disappearance.
So one of them, at least, lasted at minimum 10 days, that alone does not fit the murder theory. On the other end they started calling for help in the same day they went on the hike, how far could they have been lost?
Another thing, Lisanne was 184cm tall with a alpine hiking and volleyball background, she was pretty fit and not easy to overpower.