A simple, yet comprehensive definition of a private investigator is ' an individual who either runs or is employed by a business which provides investigative services for a fee'. However contrary to popular belief the army of 'love-tug' detectives and 'ragged' gumshoes' who pry into the private lives of respectable citizens and relax in grungy offices are going fast. Sad in a way some might say as it makes for good TV and films.