They aren't going to catch this guy are they ? Oh well.............................
Chances are good they've already interviewed him and let him go. I suspect this is somebody that lives in the area, within a 20 mile range or so, and his wife, girlfriend , partner either provided an alibi for him or simply outright lied. If law enforcement sits someone down and ask them where they were last Monday, and the person replies, "I was at home all day", and then his wife, partner, or parent verifies that information is true, then LE really has no other choice than to let him walk. An alibi is an alibi.
Why would somebody do a thing like that ? Well, in the case of a spouse or a girlfriend, she may be absolutely terrified of this guy. If she turns him in for it, and LE interviews him and lets him go, this young lady may get a beating the likes you've never seen........or worse. He killed two girls with his bare hands didn't he ? He may be the sole bread winner of the family, he may have 3 or 4 kids with this woman, she may feel that LE is incapable or unwilling to protect her should she actually turn him in........or..........he/she has already lied to the cops about his actual whereabouts that day. For all we know, BG may be meaner than a snake and twice as slippery.
The most disturbing thing to me is that apparently LE doesn't have any DNA from the crime scene or they could have cleared RL way back in the beginning. Apparently they don't have any fingerprints from the crime scene either, for the very same reason. Without a DNA match, they won't ever convict someone for this crime. A simple DNA test would either include or exclude RL from being at the crime scene, if such evidence existed. Apparently it doesn't. If they had a fingerprint or a palm print, even a partial print, same thing.
If this lack of DNA and fingerprint evidence applies to RL, then it applies to everybody else in the community as well. All they have to really work from is the hope that someone will recognize him and turn him in. I imagine someone has already recognized him and knows it's him, but has either provided a false alibi on his behalf or hasn't called it in at all.
The only way I can see to get around this problem, is for LE to go public and absolutely and positively guarantee the safety of any person who is willing to come forward and put BG at the scene. If this person lied about BG's alibi up to this point, enabling him to walk free..........let it slide. There may have been times in the past when this witness had a situation at home, say a domestic type thing, and LE either let BG off with a warning or didn't really do much at all to help. That kind of internal fear could be a great motivator to keep your mouth shut. If he can kill two young girls with his bare hands, what's to stop him from coming home and exacting the same type of punishment on the wife and kids ? The greatest fear this person might have is that LE will simply interview him and send him back home again. Promising the witness a quarter million dollars doesn't mean much if they aren't going to be alive long enough to spend it.