Name: Matthew Robles.
Died: September 1, 1980.
Age at death: 4 months.
Cause of death: Murder.
Location: El Cajon, California, USA.
Matthew was smothered by his mother. His death was presumed natural until five years later, when his mother killed his brother, John Robles, and confessed to both killings.
Perpetrator: Debra Sue Robles (Mother), pled guilty to murder, sentenced to 30 years to life.