I have never employed a private investigator and I have not in any circustance that could me suggest that I need to employ one.
I think that this profession, private investigator, is very riskly. I do not like to suffer this kind of risk. I suppose that the quote for this proffesion must be very expensive, but I do not interested at all in the money if there is a risk for my life. I prefer my "boring" job in a pharmaceutical company.