The events took place on Monday after-noon in a property of Villabé, Essonne.
Around 16: 00, a young man, 31 years old, killed his father, 66-year-old, with an ax.
Accused of a violent fight, the gendarmes are made on the premises.
The military arrived on the scene, have only been able to see the death of the sexagenarian who was lying in the driveway leading to the garage.
The suspect was arrested and placed in police custody. The latter is known to suffer from psychiatric disorders.