chunk: Karl Childers (Billy Bob Thornton) is an intellectually disabled Arkansas man who has been in the custody of the state mental hospital since the age of 12 for having killed his mother and her lover. Although thoroughly institutionalized, Karl is deemed fit to be released into the outside world. Prior to his release, he is interviewed by a local college newspaper reporter, to whom he recounts committing the murders with a Kaiser blade, saying, "Some folks call it a sling blade. I call it a kaiser blade." Karl says he thought the man was raping his mother. When he discovered that his mother was a willing participant in the affair, he killed her also.