Sam Lockhart, Camm's uncle -- and one of his biggest supporters -- said the prosecution is trying to hide the truth by limiting the testimony of Charles Boney in Camm's third trial.
"The prosecution has a vested interest to get David Camm convicted again. So in order to get him convicted again, they've got to hide the truth."
Lockhart believes Boney murdered Camm's wife and children.
"The truth is Charles Boney is the one who murdered Dave's family," Lockhart said.
Camm, a former Indiana State Police Trooper has twice been convicted of killing his wife, Kim, and their two children -- Brad and Jill -- in the garage of their Georgetown, Ind. home on Sept. 28, 2000.
Boney became a suspect prior to the second trial and was eventually convicted; however, both of Camm's convictions have been overturned. Camm and Boney were tried separately.
In court on Monday, the two sides argued over what evidence and who should be allowed to testify in Camm's third trial. The defense accuses prosecutors of trying to limit Boney's involvement, saying prosecutors want to present a sanitized version of Boney.
Meanwhile, the prosecution had little comment outside the courtroom Monday other than to say the evidence would be limited to what is admissible.