Don't bother with him.. He seems like a real dick. Anyone with a bit of world knowledge knows of these types of events.
Yes, admittedly my description of 'I know a story' was a bit shit but this is getbig so I just write what first pops into my head even.
Though I do personally have an old police friend and do believe him and have met a few detectives, one which I was told by my police friend spent a third of his salary on booze, probably due to the work.
But if anyone speaks to a person in a third world country and mentions the idea of a single young women or man hitchhiking and they will say it is common sense that she or anyone should not be doing this as the chances of getting raped, murdered or at least robbed is very high.
I think the same applies to parts of South America as well where the situation is the same or worse.