Immigrants who were detained at a suburban Denver facility while they awaited deportation proceedings are suing the private company that held them, alleging they were paid $1 a day to do janitorial work, sometimes under threat of solitary confinement…On Monday, U.S. District Court Judge John L. Kane declined a request from…GEO Group Inc. to dismiss the claims against it…The company has denied wrongdoing and said in court documents the work is voluntary and it is abiding by federal guidelines in paying $1 a day…Attorneys for the immigrants say…the judge's ruling clears the way to gather more information from GEO through discovery proceedings about how many detainees were put to work…GEO responded in a statement that its facilities “provide high-quality services in safe, secure and humane residential environments, and our company strongly refutes allegations to the contrary.”