Sue, if are going forward with this I am in full support and will do what I can to help from here. A couple of points:
1. Yes, the chances of finding anything are slim to none, but it must be done. Because this will be one more thing that people did on there own that the police never bothered to do. It is important to show that we will go the distance where they will not. Find evidence is not the point; making an attempt is what is important.
2. When you get your dates together let me know: I believe the police must be invited to lead it or participate, if they decline that will be one more reason to criticize.
3. The media will definitely need to be made aware that a group of citizens is doing this, not the police.