Peterson is a suspect in the Oct. 28 disappearance of his fourth wife, Stacy Peterson. He is also being investigated in connection with the March 2004 death of his third wife, who allegedly drowned to death.
Peterson's sons, Thomas, 15, and Kristopher, 13, received subpoenas last week, but would not be summoned to appear at a canceled Thursday session, the Joliet (Ill.) Herald-News reported.
Peterson's sons are being represented in court by Chicago lawyer Robert Novelle, Peterson's attorney Joel Brodsky said. Brodsky also said Novelle is responsible for the postponement.
Brodsky said Peterson is keeping a separate lawyer for his sons as a matter of protecting their interests.
"He has to protect their rights, make sure they're not being harassed or bullied," Brodsky said. "They need a very tough criminal defense lawyer. And that¹s what they got."