Context : Frederic De Frouville (Virginia, ca.1850 -- April 4, 1883) was an American noted for committing a murder-suicide in Washington, DC. De Frouville murdered his estranged wife, Andrea De Frouville, née Andrea Marie Wolstrup in Denmark, on April 4, 1883, and then shot and killed himself. 
Question : What was the cause of death of Frederic De Frouville?
suicide