Hopper was slain during a Jan. 1 shootout with Michael Ferryman at the Enon BeachCampground, 10TV News reported.
Maria Blessing was indicted on charges of complicity to commit weapons underdisability and obstructing justice.
Blessing was Ferryman's girlfriend, officials said.
Her father, Jean Blessing, 81, also faces charges of complicity to commit weaponsunder disability.
SLIDESHOWS: CamperFire | Images From Standoff (NOTE: Images Of Officer Jeremy Blum Shot May BeConsidered Graphic)
Hopper and German Township Officer Jeremy Blum were investigating reports ofgunfire at the campground when they were shot. Blum survived his injuries.
Ferryman exchanged gunfire with responding officers before he was found dead in thetrailer. It has not been determined if he took his own life or was killed by police fire.
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Previous Stories:
January 15, 2010: Arson Ruled In Clark County Camper Fire
January 7, 2010: Thousands Pay Tribute To Slain Deputy
January 5, 2011: After Deputy Slaying, Mental Health Officials Reviewing Case
January 5, 2010: Radio Traffic Reveals Tense Moments During Clark Co. Shootout
January 3, 2011: Slain Deputy Remembered; Investigation Into Shooter Continues
January 3, 2011: Authorities ID Gunman Who Killed Deputy
January 2, 2011: Slain Deputy Was Married, Had 2 Children
January 2, 2011: Deputy Killed, Officer Shot In Gunbattle With Suspect
January 1, 2011: Deputy Killed, Officer Shot While Responding To Call
