Ricardo Barreda
Ricardo Alberto Barreda was an Argentine dentist who was sentenced to life imprisonment for the murders of 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. Barreda died nine years later at a care home with Alzheimer's disease from a cardiac arrest.