Nope. No news. No body, no crime scene, no fingerprints, no DNA. I don't know how this case can be solved. You hear the usual pundits say that allegiances change over time. They may change, they may not. But relying on this assumes that someone other than the murderer(s) knows who did it and has some powerful evidence to provide. Simply saying that Mr X was having an affair with Claudia, or was showing signs of stress etc won't get a conviction. I also suspect that, if someone provides a name, it may be someone the police have already put under the microscope.
It's a bit like the Alistair Wilson (of Nairn) case. No DNA, no finger prints, no CCTV. Finding someone with a motive won't be enough. Failure to provide an alibi for something so many years ago can't be held against someone.