In the first few minutes during the poker scene the players' chips change from shot to shot. Only one hand is played, but the chips are shown changing several times.
Jensen tells Olsen that he could make it to the Indian reserve, 90 to 100 miles away, in a day or a day and a half. In good walking conditions this might be just barely possible for a seasoned hiker; but not through mountainous terrain, in the dead of winter, with a foot of snow on the ground. Jensen has lived at the camp for three years, and would presumably know better.
During the discussion post-autopsy, there is a crew member on the left side of the shot.