Jury selection is underway for a Joplin man accused of helping to kill a pregnant Springfield woman and her three young children. The first-degree murder trial of Bobby Lingle is being held in St. Louis County on a change of venue. Lingle`s attorney`s say he doesn`t have the mental capacity to be guilty of premeditated murder. Prosecutors accuse Lingle of assisting in the January 1999 killings of Erin Vanderhoef and her children. They say Lingle`s motive was to help his friend, Richard DeLong, and in exchange for that help, to receive $250 worth of methamphetamine.