The Randolph County trial was scheduled to begin July 6. But Peterson's lawyer said Friday in a brief hearing that the 61-year-old ex-Bolingbrook officer needs more time to prepare.
Prosecutors didn't oppose the request. The trial is now set to start Aug. 28.
Peterson has pleaded not guilty to charges he solicited another prison inmate to kill Will County State's Attorney James Glasgow. Glasgow prosecuted the 2012 case in which Peterson was sentenced to 38 years in prison for the death of his ex-wife Kathleen Savio eight years earlier.