Fisrt, I never hired a private investigator as that was no need. But if at any time it could help solving an issue, why not?
Since I was a child I found interesting issues related to police investigations as TV series, movies, books like Agatha Christie ones and so. Because this kind of a job seems to be exciting and almost every day you have different things to do. I am aware of that in real life criminal investigations and the way cases are solved are far from what movies and C.S.I may depict on TV screen. Even though, I did think about getting a job as a criminal investigator or even as a scientific police.