But if you look at other missing adult cases, how often are family poly'ed, even if they were the last ones to see the missing person? Not often. In this case, due to my own assumptions of the familys grief, I would see it being counterproductive. If the brother took and passed, more power to him, but if he did not, i don't see it meaning anything except that he likely does carry a great deal of guilt, not due to involvement, but due to being the person that saw her led away and thought everything was alright. He's her big brother, and I can only imagine how one of my brother's would feel if they saw me talking or walking with someone and discounted it as a normal occurrence...and then found blood in the driveway and realized what had just happened. I pity him and I hope that he can find peace with the whole situation.