A DETECTIVE'S NIGHTMARE There he was sitting emotionless and quiet for the past six years in a Los Angeles courtroom, without ever uttering a word in his defense. Lonnie Franklin Jr. also didn't have much of a reaction when he was sentenced to death for the murders of a teenage girl and nine women. Better known by his moniker, Grim Sleeper, a name given to him by the L.A. Weekly in 2008, Lonnie Franklin Jr preyed on drug addicts and prostitutes in a crime spree dating back three decades in Los Angeles. One of the longest operating serial killers in history, the Grim Sleeper targeted poor black women from 1985 until 1988. The killings stopped abruptly and no one was apprehended by the police...Until he began again.