Apart from my hinky meter going full on hinky when I hear Canadian friends and family talk about the case,
1.We don't know that Paul drove to the trailhead. We only know his car did.
2. We have only a vague witness report that he was encountered on the trail.
3. We have no corroboration that Paul intended to hike the trail that day. If he was as experienced in the outdoors as his family are claiming, he would not have been on the trail.
4. The equipment and clothing they say he took would not be the right set up for an "experienced" outdoorsperson. There is no corroboration for it.
5. Evidently, no one thought to check video at the hotel, e.g. in the parking lot.
6. SARS was out there quite soon and didn't find anything.
7. Where was the second set of car keys? They only had one?