A little update.
I work for the the same agency Katy did (in Texas) and had been interviewed by the investigators. Recently a rumor had floated around in Texas that they had found the guilty party and arrested [him]. Well, the whole story sounded a bit far-fetched, so I had a friend of mine (a mutual friend of Katy's) call the investigators that had interviewed us.
As it turns out, the story ended up being a fake. BUT, they did say that they had some decent leads on a couple suspects. Supposedly, there was an arrest to be made recently (last week or so) of a person for unrelated charges, but that this person was suspected to be involved in Katy's murder. Another suspect was in custody for other unrelated charges and was to be questioned after the first one was taken into custody. I have not called the investigators back to find out...just been wathcing the Newcastle papers for headlines to show up (nothing so far).
Anyway, at least they have suspects pin-pointed. The investigator, according to my friend, showed no reservations about discussing the facts...so I guess they won't mind getting calls? (I'm not sure what proper protocol is there...if this irritates investigators or not.)