A Marathon County Jail inmate who went missing from a work release assignment in Huber last week is now being held in the Oneida County Jail.  Lac Du Flambeau police took Sierra Thoms into custody in Vilas County.  She had failed to return to the jail in Rhinelander last Thursday.  Thoms has been serving a one-year sentenced on an identity theft conviction.  The search was concentrated on Vilas County because she has ties in that area.