I saw that, I use to live 45 miles to the east of that area and know the hills and mountains around there well. I think that young man is running away from something, not lost in the hills or mountains
BTW, there are many very good volunteer search and rescue groups threw out SO CA, many, many as well as several, more than i can remember now, government funded and ran search and rescue agencies : work:
I hope he didn't commit suicide