Taken domain name

[Magiccupcake]

I have a client that would like us to build a website using a domain name that they already had. www.cwmc.com, but the person that set up the site for them ripped some people off and now they can't get a hold of him. Is there anyway to get that domain? I think that the only way would be for the other guy to transfer it to us, but I thought someone here might know a way.

Thanks