Hoffman,18-years-old at the time of the rampage, had been diagnosed as being clinically depressed and was taking the antidepressants Celexa and Effexor prior to the shooting. He committed suicide in jail one week before sentencing. Authorities in El Cajon, California Hold a News Conference on the Shooting at Granite Hills High School Aired March 23, 2001 - 2:30 p.m. He was to be sentenced on Nov. 8 to 27 years to life in prison. Goyases School shooting; Granite Hills High School shooting; H. Heath High School shooting; K. Kungälv school shooting; L. La Loche shootings; List of mass shootings in the United States; M. Marysville Pilchuck High School shooting; 2014 Moscow school shooting; O. Olean High School shooting; P. Age: 18. Dan Barnes is â¦ Population: Secondary School. âThis was an obviously troubled young man and itâs a â¦ Jason Hoffman (Granite Hills High School shooting, 2001) â opened fire at Granite Hills High School, injuring three students and two teachers March 22, 2001 in El Cajon, California, a suburb of San Diego. Last month, Hoffman pleaded guilty to six felony counts for the March 22 shooting at Granite Hills High School in the San Diego suburb of El Cajon. On March 22, 2001, Agent Agundez was on duty as a school resource officer assigned to Granite Hills High School, just three weeks after the deadly Santana High School shooting. Hoffman fired at him, but missed. Psychological type: Traumatized. A â¦ The shooting at the 60-acre Granite Hills High was the second area school shooting in less than a month. Marie Aromin, 17, a senior at Granite Hills, said by cell phone that the campus was locked down at about 8:15 a.m. just as school â¦ The March 22 shooting came just 17 days after an outburst of violence at nearby Santana High School in Santee, which left two students dead and 13 others injured. On Thursday afternoon, officers responded to Granite Hills High School regarding a possible student who had been stabbed. ET THIS IS A RUSH TRANSCRIPT. Information about the school shooter who perpetrated the Granite Hills High School shooting. Granite Hills High School On March 22, 2001, at 12:55 p.m., an 18-year-old male, armed with a shotgun and a handgun, began shooting in Granite Hills High School in El Cajon, California. Twenty-two years later, his son, Dan Barnes, also a teacher, found himself a target of Granite Hills High School shooter Jason Hoffman. PORTERVILLE, Calif. (FOX26 NEWS) â The Porterville Police Department says a teen is going to survive after he stabbed himself while at school. 2002 Appalachian School of Law Students at Granite Hills High School were locked inside their classrooms since the start of the school day as police searched for a suspected killer in the nearby orchard. Attack type: Mixed. No one was killed; five were wounded. Six miles away, authorities said, 15-year-old â¦ The shooter was shot by police.