First I am a 팬 of these shows even though as 당신 read this 당신 will 질문 that.
They spend a great deal of money and are called 의해 some experts but they use highly questionable methods in almost every case.
First they tell the investigators what to expect. 당신 never do that if 당신 want to verify something, 당신 allow everyone to find what they do then compare to see if they match. This way 당신 get accurate information and i would guess a lot less of the: "Did 당신 see that?" When there is no way for us to see because the camera is always in the wrong place. There are cameras like those used...