Meanwhile, Peterson made an impassioned plea for the media to "watch over" his children during what he says are "vindictive legal proceedings."
Peterson was charged with possession of an illegal firearm after authorities learned he gave a short-barreled rifle to his son, Stephen, for safe keeping. Peterson's attorneys told Judge Richard Schoenstedt on Tuesday that Peterson could legally possess the weapon because he was a police officer at the time.
But prosecutors say Peterson giving the weapon to his son had nothing to do with his duties as a police officer.
In a letter to the media given to Chicago Sun-Times columnist Michael Sneed, Peterson calls Stephen a "good man and a dedicated father and policeman" and asks the media to "watch over" his children.
Peterson's letter makes the claim that his children have been robbed of their father because of the charges against him.
"All my children are exceptional kids just wanting a happy childhood after their little worlds were turned upside down three years ago," he wrote.
The judge will decide Oct. 1 whether Drew Peterson can be prosecuted on the illegal weapons charge.