Speaking of geese. Here is my stupid theory about the resolution at least as far as the plane is concerned. It would be rather funny if by happenstance a flock of geese passed between the F-15 fighter and the biz jet. The radar signature of the flock is big enough for the radar to lock on to them instead of the plane. As a result the missiles home in on the geese. The missiles then explode since they have proximity detonators tearing the flock to pieces. Meanwhile the biz jet continues to lose altitude until it falls off of the F-15's radar which considering they are at 1,000 feet is entirely plausible especially since the F-15 is 20 miles out in mountainous terrain. This would turn out to be an interesting scenario considering that they were meant to crash with goose blood on the plane to make it appear to be accidental, but it turns out that a flock of geese saved their lives.
As I said, its a dumb theory, but I thought I'd throw it out there regardless.