Christopher Vaughn, of Oswego, is on trial in Will County for the murder of his wife, Kimberly, and their children in 2007. | Will County Sheriff's Office via AP

Lisa Hinds (right), manager of Scores in Stone Park, leaves after testifying about the money Christopher Vaughn spent in the days before his family's murder as seen outside the Will County Courthouse Thursday, August 23, 2012, in Joliet. | Matthew Grotto~Sun-Times Media

The Vaughn family, (upper left to right): Christopher, Kimberly, Abigayle, and (bottom from left) Cassandra and Blake are shown in an undated photo in front of Rosemont Theater in the Chicago area, where the Phoenix University graduation was held.

Blake Vaughn, 8; Christopher Vaughn, 32; Cassandra Vaughn, 11; Kimberly Vaughn 34; and Abigayle Vaughn, 12; smile in their Oswego home. Kimberly Vaughn and the three children were found shot to death in the family SUV in 2007. | Submitted photo

Christopher Vaughn

Prosecutors Jim Long (left) and Chris Regis (right) return from lunch during day two of the Christopher Vaughn murder trial at the Will County Courthouse Tuesday, August 21, 2012, in Joliet. | Matthew Grotto~Sun-Times Media

Defense attorney George Lenard departs during lunch break during day two of the Christopher Vaughn murder trial at the Will County Courthouse Tuesday, August 21, 2012, in Joliet. | Matthew Grotto~Sun-Times Media

Prosecutors Debbie Mills (left), Chris Regis (center) and Michael Fitzgerald (right) depart at the conclusion of day two of the Christopher Vaughn murder trial at the Will County Courthouse Tuesday, August 21, 2012, in Joliet. | Matthew Grotto~Sun-Times Media

Prosecutor Debbie Mills departs at the conclusion of day two of the Christopher Vaughn murder trial at the Will County Courthouse Tuesday, August 21, 2012, in Joliet. | Matthew Grotto~Sun-Times Media

Prosecutors including Michael Fitzgerald (center) depart at the conclusion of day two of the Christopher Vaughn murder trial at the Will County Courthouse Tuesday, August 21, 2012, in Joliet. | Matthew Grotto~Sun-Times Media

Prosecutor Michael Fitzgerald departs during lunch break for the Christopher Vaughn murder trial at the Will County Courthouse Wednesday, August 22, 2012, in Joliet. | Matthew Grotto~Sun-Times Media

Christopher Vaughn. Photo input: 8/15/12. Will County Sheriff's Office.