Going to be interesting to see what tipped them off,hope they reveal that soon,if there is a probable cause hearing in the next week or so,they will then..in addition to the above,from the story it sounds like he was burglarizing and robbing his victim as well,I wonder if maybe he needed money and tried to pawn something that was valuable from them,and they got him that way..it could be any number of things though,guess we will find out eventually..
So it turns out that some relative submitted their DNA to one of those DNA ancestry databases and it was a close enough match to allow them to search their family and find the likely suspect. They then got a sample of his DNA - likely by taking his garbage. It raises some interesting legal and privacy issues. The good news is that they got him. The bad news is that his lawyers will challenge much of this as the product of an illegal search. Imagine if they have to let the guy go!