Christopher Vaughn leaves the Will County Courthouse in June. | Matt Marton~Sun-Times Media
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
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