Authorities say Heriberto Pagan, of Brooklyn, shot his 47-year-old grandson outside of a Staten Island house Friday evening before shooting 28-year-old Claritle Christina Huerta in the head inside the house. Huerta died at a hospital.
Police say Pagan fled in his car and shot himself in the head several blocks away. He was found outside his car.
The grandson is in stable condition at Staten Island University Hospital. He was not identified.
The couple's 4-month-old son was found unharmed inside the house.
The child is in the custody of the Administration for Children's Services.
Police say a motive for the shootings isn't yet clear.