One witness lost his immunity and another was held in contempt of court Tuesday as the state continues building its murder case against Tad Blackburn.

A witness testified that he saw the body of Tamara Magic in the hallway of her home in November 2007.

John Charles "JC" Root said Aaron Jones was the only one in the house with the body when he and Jeremy Smith arrived for the second time that day to sell cocaine to Jones and Blackburn, who was Magic's boyfriend.

Jones blamed Blackburn for Magic's death, saying "Tad knocked Tammy out."

Jones was alone with the body and claimed he was attempting to revive Magic when police arrived at the home.

Originally charged as an accessory to Magic's murder, Jones has pleaded guilty to a drug charge and misprision of a felony, which involves hindering an investigation. In exchange, the accessory charge was dropped. But on Tuesday, Jones refused to testify at Blackburn's trial. Jones claimed his Fifth Amendment right to avoid saying anything that might incriminate him.

Deputy Pennington County State's Attorney Tracey Decker said officials over the weekend had reopened the investigation of Jones and revoked the offer of immunity from prosecution offered for his testimony against Blackburn.

Later in the day, Smith also invoked the Fifth Amendment, earning a contempt-of- court charge from Seventh Circuit Judge Thomas Trimble.

Prosecutors opened Tuesday with a pawn shop employee, relating his transaction with Blackburn the night Magic died.

Blackburn brought a flat-screen television to the shop, along with several rings. The television was so big that it took two people to lift it out of the vehicle Blackburn was driving. Monday testimony suggested Blackburn was seen driving Magic's vehicle the day she died.

A television set was missing from the entertainment center in Magic's home.

Blackburn received $100 for the television, but pawnshop employees refused to buy the rings, because there was blood on them.

Jurors also heard from police investigators and a forensic scientist.

Dr. Donald Habbe testified that Magic suffered stab wounds that were not serious enough to kill her. He also explained the blunt force trauma injuries to her head. Jurors saw pictures of her wounds, including graphic details of skull injuries that killed her.