Yeah, the fact that the islamists were happy to assume that one of them did do it and crow all over the world certainly did not help matters any, but from what the article showed (and I am presuming more evidence will be forthcoming) that yes, sometimes ordinary, penney-ante lowlifes do commit extraordinary atrocities. The ATM card clinches it, no mention of the stolen jewelery, though. The cops probably had it figured out within hours but they had to keep from spooking him until he made a mistake, so the DA had to prevaricate and take the bad publicity. They are owed an apology.
When you kill a man as a point of (twisted) honor. You don't run off with his silverware.
Click on the link, and you'll find out they were looking at these two from the start.