This is a complete mini unit that focuses on argumentative writing using textual evidence. This unit starts by reading "Lamb to Slaughter" by Roald Dahl. This short story is extremely gripping for students of all abilities. After reading, students examine the history of the insanity plea. Students read an article from PBS and complete a guided note taking sheet. This article examines the history of Hinckley, the man who shot Reagan, and his impact on the insanity plea deal. Students then read the closing argument from the Hinckley case and identify key features of the closing arguments. Students then writing closing arguments that build a case around the wife in "Lamb to Slaughter" being temporarily insane. Students deliver their closing arguments to the class. A rubric and student feedback sheet is included.