A coroner's investigator says a 15-year-old student who shot himself in the head after firing a shot over a teacher last week at a Louisiana middle school has died.

Mark Goldman, the chief investigator for the Lafourche Parish Coroner's office, says eighth-grader Justin Doucet died Saturday morning at Terrebonne General Medical Center in Houma.

Police say Doucet entered Jessica Plaisance's seventh-grade class and fired one shot over her head, missing her. He then walked into a nearby bathroom and shot himself with his father's nickel-plated pistol.

Sheriff Craig Webre said Tuesday that Doucet's writings indicated he had planned to kill four students and himself. No students were named as specific targets. Nobody else was hurt in the attack.