I'm a killer (bad pun) when it comes to cold cases. My concern with putting it cold crimes in the crime/political board is that it woiuld fall quickly... passed over by the folks with their politics threads.
If they had their own section, we could see it more clearly. I've got about several off the time of my head I could start with.
I have a "who dun it?"
I have a "We know who done it but we can't prove it...."