See, that's why blogs like http://thinkhard.org/ are so much better at this than I am. I'm sure there's a lot I've missed. In my defense I woke up at half six this morning and found the news story and set about half an hour or so of commenting on it!The other aspect that has been commented on quite a lot today in the news is how it also eliminates the innocent from enquiries. Which is one of the weakest arguments for it in my opinion. If you are a suspect and DNA can clear you, then you can have your DNA taken there an then to eliminate the possibility.