How much time is spent investigating a particular criminal case? - Answers

I'm not certain that there are any accurate and reliable statistics on this particular matter. Depending on the circumstances of an individual case and what the investigators have to work with in the way of evidence and suspects, it can be anywhere from a few hours to days. If a particular case does not end in an arrest or the naming of a viable 'person of interest' it is usually followed until all leads are exhausted and there is nowhere else to go. The reality is -- Criminal investigators have an un-ending flow of new incoming cases that all demand their attention. Unlike TV, unless it is a a politically charged or particularly noteworthy case, they do not have the luxury of working on nothing else until it is solved.