Ramón Laso Moreno (born 1955) is a Spanish serial killer convicted in 1993 for the murders of his first wife and six-year-old son, and in 2014 for the murders of his second wife and brother-in-law. The second conviction has been named as the first murder conviction in Spain without a confession, murder weapon, body, or any organic remains of the victims. Laso disputes the validity of other forensic evidence and continues to claim his innocence.