Police suspect that Kam McLeod, 19, and Bryer Schmegelsky, 18, killed three people earlier this month in British Columbia before driving about 3,300km (2,000 miles) east, leaving two burnt-out vehicles in their wake, and disappearing into the Manitoba wilderness.
A massive manhunt for the pair is under way and, after a recent search around the community of York Landing, it is now focused on their last confirmed location - Gillam, Manitoba - and the surrounding woods.
Dave MacDonald, lead instructor at the International Canadian School of Survival, knows the area well.
He did search and rescue work with the Royal Canadian Air Force for 19 years and has spent time in the region as an outdoor enthusiast.
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