LEBANON, Mo. (AP) — The murder trial of a Missouri man charged with killing a couple in their rural home was to start Monday with state Attorney General Chris Koster assisting the prosecution. Jesse Driskill, 33, could face the death penalty if convicted of first-degree murder in the 2010 deaths of 82-year-old Johnnie Wilson and 76-year-old Coleen Wilson. The couple was found in their home in Laclede County north Bennett Spring State Park. A probable cause statement said they were covered in blankets, a fire had been set in the home and one of the vehicles was missing. The car was found burning along a road. The murder trial is scheduled to start Monday at the Laclede County Courthouse in Lebanon, Mo. Driskill has pleaded not guilty and is represented by two assistant public defenders. Personal participation in the trial by Koster is unusual but not unprecedented since he became attorney general in 2009. He is working on Driskill's case with the local prosecutor. Koster also worked with Jasper County Prosecuting Attorney Dean Dankelson in a Medicaid fraud case, in which a dentist pleaded guilty in 2009. In 2010, Koster prosecuted a Jackson County murder case and a year later represented the state for sentencing of a Fredericktown police officer and Boy Scouts leader who pleaded guilty to 22 counts related to sexual abuse of minors. In 2011, Koster represented Missouri in an effort to stop the U.S. Army Corps of Engineers' plan to breach the Birds Point levee in southeastern Missouri and argued another case before the U.S. Supreme Court. Koster, a Democrat, told The Associated Press this past April he is making preparations to run for governor in 2016. He previously served in the state Senate and was the Cass County prosecutor from 1995 to 2005.