It's not a matter of missing a turn or not - it's a matter of missing a turn, going oh heck, and not being able to turn back to get to the correct turn, or, as I've found with my in-car GPS, missing a turn. but seeing an alternate route just ahead anyway, so no biggie, right? I'd be stunned if there was NOT a GPS in that vehicle.
But at this point, I think the game is over - they found his PANTS - which is a very, very bad sign.