Infamous Defendants Who Represented Themselves

Waseem Daker was sentenced Oct. 1, 2012 to life in prison for the 1995 murder of flight attendant Karmen Smith and the repeated stabbing of her 5-year-old son, Nick. During the trial, Daker grilled Nick Smith -- now a young man -- and Karmen Smith's good friend Lottie Spencer, whom Daker had previously stalked. WATCH THE FULL STORY ON "20/20" FRIDAY AT 10 P.M. ET. (ABC News)