Quote Originally Posted by FoxyBunny View Post
Polygraphs serve a good use as a tool, usually one that can initiate further investigation. Missing child....bring every adult in the neighborhood in for a poly. Two of them get "lying" results. These are two people that you definitely need to look into more and question further. They may not be guilty, but you should follow up.
Definitely saves week of profiling, investigation of a much larger pool of people... But not for evidence.