"Who killed these women?" is an intense examination into the largest unsolved mass shooting in modern day America today. On Feb 2, 2008 a killer executed five women inside a Lane Bryant department store in suburban Chicago. One person managed to survive as she shifted her head at the last second as the bullet then grazed her neck. Director Charlie Minn(77 minutes, Americas Most Wanted) interviews former Lane Bryant employees, families of victims, ex-law enforcement personnel and first responders to get their input on this confusing tragedy.