More testing planned in Oswego family killings

A judge in Will County has approved further testing on the coat an Oswego man was wearing when his wife and three children were found shot to death in 2007.

Christopher Vaughn is accused of killing his family inside their SUV, which was parked on a frontage road along Interstate 55. Authorities found Kimberly Vaughn shot to death, along with their children, 12-year-old Abigayle, 11-year-old Cassandra and 8-year-old Blake.

Assistant State's Attorney Mike Fitzgerald on Monday said prosecutors asked for more DNA testing on the coat. The (Joliet) Herald-News reports the coat then will be sent to a ballistics expert for tests requested by Vaughn's attorney.

Vaughn told police that his wife shot him in the leg before killing the children and committing suicide. He's charged with first-degree murder.