George Dewey Davis, now 47, was hired by Shelter Inc. in the spring of 1997, a little more than a year after he was paroled from state prison.  He served seven years of a 16 year sentence for molesting a Contra Costa County boy.  According to the Contra Costa Times, the registered sex offender managed a Shelter Inc. house for young adult mental health clients for more than two years.  A suit has been filed against him and the agency's leaders.  Seven young adults and one parent filed the suit, which also names Phoenix Inc., a non-profit agency that has contracted with Shelter Inc.  Although the suit names several defendants, Davis is responsible for the most serious allegations, that young women were forced to have sex with people he knew, that he extorted money and that he threatened to kill or rape one resident.