Has anyone ever heard of Liberty as a computer brand or have any information about them?

Sounds like a custom build.  Liberty could be the name of privately owned computer store that assembled the machine.

Sounds like a POS (point of sale)system. Would this be the company?
http://www.libertycomputers.com/

It is definately a POS system but that is not the right company.  I have looked into them already.  I also have thought about it being a private company, but I couldn't find any that would be a reasonable choice (close to the resturaunt, etc.).

Could you take a pic of the case, and fan and post it here. Also any part numbers on the case would be helpful.

Here are the numbers that I could find:
LD9034807  Sticker on motherboard  serial number?
PD9307232A  Sticker on pwr supply  dont know if that will help
1002316  Sticker on case  serial number?
Liberty  Brand name I guess

I don't have the case.  It is still on site but these are the numbers I pulled off of it while I was there.  I can't find anything for them anywhere.

Thanks

Some more possibilities.
http://www.libcomputer.com/home_user.htm
http://www.libertycomputerservice.com/

Without a picture it may be difficult.