I wonder how much the genealogy route would really help, though. GEDmatch is so far the only source LE can use, right? DNA testing kits aren't nearly as popular in Europe as they are in the US, especially mainland Europe. I'd say that people in the UK probably have done more than places like Germany and France (DNA testing kits are illegal in France, but some manage to do it anyway) and even I (I'm English) have far less matches than people in the US usually do. Isdal woman would likely have very few matches. Even out of Europeans who take the tests, I doubt many care enough to upload to GEDmatch. Still, it would give LE at least a few clues and I think it's worth doing. Even enough third or fourth cousin matches can help identify someone.