Ricardo Barreda
Ricardo Alberto Barreda (16 June 1936 – 24 November 2020) was an Argentine dentist who was found guilty of murdering his wife, Gladys McDonald, his two daughters, Cecilia and Adriana Barreda, and his mother-in-law, Elena Arreche on 15 November 1992. He was granted parole on 29 March 2011, and he died nine years later at a care home with Alzheimer's disease from a cardiac arrest. References 

1936 births
2020 deaths
Argentine dentists
Argentine mass murderers
Argentine prisoners sentenced to life imprisonment
Deaths from ventricular tachycardia
Familicides
Femicide in Argentina
National University of La Plata alumni
Violence against women in Argentina