Here's a tip for you.
One of those guys is smokin a cigarette.
Likely he will have smoked one before going in and the one he has in his mouth on the way out and dropped the butts.
You need to test the case for any DNA left behind from skin cells where the bar was taken out on the plexiglass, and also find that cigarette butt and get a dna sample from each.
Then run the two dna samples thru the CODIS DNA database using a "familial search". You only need a % age match to ANY member of their family, who is on the database, even if those two perps aren't on it.
From any family % age match start building a family genealogy tree using births deaths marriages and genealogy websites.
Create a couple psychological profiles of these two, and start fitting them to the members of the two genealogical family trees.
When you get a near match, use that to get a warrant to take DNA sample by court order and match it to those you have from the case and ciggarette butt!
Then you have the guys - whether their individual DNA is on the codis database or not.
Tricky eh!
P.s. - remember me when it comes to the reward - I have a not for profit charity foundation it can go too - to help the families of missing children pay for DNA testing for familial searches of the CODIS database in order to track their loved ones.
There's a huge problem in our nation - where going missing is not a crime so without a body these kids just remain missing persons and Police have no legislated responsibility to do squat to find them. That includes not even reveiwing them as cold cases...
Families with their kids missing for 10 or 20 years need closure and without finding remains - theres no crime. Heck our police don't even have a trained cadaver dog.
Trust me - the reward money will be well used and these families deserve all the help they can get coz they have no one else to turn too.
Finding such missing kids is my treasure - for the relief & closure it brings to the families.
You can change your identity but you can't hide your dna - or your families dna.
Cheers