The Oswego man is charged in the 2007 fatal shooting of his wife and three children. Their bodies were found inside the family's SUV on a side road in Channohan, Ill.
Vaughn, who had a gunshot wound on his thigh, told police his wife, Kimberly, shot him and their children -- Abigayle, 12; Cassandra, 11; and Blake, 8 -- before taking her own life.
The family was headed to a waterpark.
During the first three weeks of testimony, prosecutors called forensics experts and a stripper Vaughn allegedly confided in.
Prosecutors say the Oswego man killed the family so he could move to Canada.
Prosecutors say the Oswego man killed the family so he could move to Canada.
