The Killer Clown Murder: Unmasking the 1990 Marlene Warren Case and Sheila Keen Warren's Shocking Release   Few true crime stories blend the macabre whimsy of a circus performer with the cold brutality of murder quite like the Marlene Warren killer clown case. On a sunny afternoon in Wellington, Florida, a mother of two answered her door to what she thought was a cheerful surprise—only to be gunned down by a figure straight out of a nightmare. For 27 years, this Florida cold