In my experience with a Polygraph examination which resulted from a citizens anonymous compaint (which I subsequently passed) the Polygraph operator went on a fishing expedition asking me if I had ever lied to a supervisor or lied on police reports etc.  This was totally unrelated to my complaint.  I passed both the original complaint portion of the test and the fishing expedition but was left with a total lack of respect for the process.  I have also lost a great amount of my respect for my police department (Kansas City, Missouri Police Department).  Our agency has been known to polygraph officers over a scratched fender on a squad car.  After experiencing this abusive use of the polygraph and the abusive nature of the command staff in allowing this type of use of the polygraph I greatly regret my choice of police departments.