The 3-year-old was pronounced dead at the hospital.
According to CBS News, the older boy retrieved the gun from atop the refrigerator Saturday night and a game of “Cops and Robbers” began with his 3-year-old brother and the loaded gun. Shortly after, the bullet struck the infant in the face, killing him.
Police spokesman Anthony Guglielmi says their father Michael Santiago told investigators that he was a former gang member and felt he needed the gun to protect his family.
Santiago is now facing felony charges for the death of his 3-year-old son.