Sub-prime mortgage watchdogs kept on leash

``Executives at the two main firms that hired the freelancers -- Shelton, Conn.-based Clayton Holdings Inc. and San Francisco-based Bohan Group -- say the reviewers weren't there to find every potential problem with a sub-prime loan. Rather, the executives say, the job was to perform specific tests to help buyers determine how much to pay for a pool of loans. In some cases, the investors wanted only minimal testing, said Frank P. Filipps, Clayton's chairman and CEO.''