So many cold cases are being solved by DNA now but the perpetrator was originally ruled out as a suspect by a polygraph. It's terrible that it's still used to rule out a suspect.They were given one according to LE and passed, hence they were no longer being considered as suspects. Of course, until her remains were found on the brothers' property. Oops.
The point of my post was polygraphs are a joke and shouldn't be used at all, anywhere. The fact that many LE communities still use them and rely on their results is just embarrassing given what is and has been known for decades about how unreliable they are.