So, you may know the answer, how many criminal investigations lead to the conviction of the criminal? Are there stats on this? I don't know.
.....the need to know what is important to know is critical here. Conviction rate is not important and it does nothing to solve the actual crime.....however, even if the crime is not solved, that doesn't mean there were no criminals related to the crime.....as the crime does exist and that crime depends on the criminal as the cause.
While you know what the criminal or price did, all the evidence left at the scene does not tell you what the criminal or price will do next.
.....criminal and price here are not the same.....crime is an effect (a fact), created by a cause (the criminal).....by analysing evidence leads to solving the crime (to catch the criminal).....it has nothing to do with what the criminal will do next!!.....you are asking the wrong questions.
.....price on the other hand.....you are only looking at relative truth at face value.....which in itself an illusion.....one needs to understand the "how" and "why".....furthermore.....a need to comprehend.....where a very few can achieve.....I say less than 1%.....yet it is obvious.