On January 29, 1979, a 16-year-old girl named Brenda Ann Spencer from San Diego, CA, opened fire at a nearby school from her residence, using a semi-automatic .22 caliber rifle that she received from her father as a Christmas gift.
Nearly eight children were seriously wounded in the tragic incident. The school principal and a custodian who were trying to save kids from the gun ambush died of gun wounds. When a news reporter asked Spencer why she targeted the school and killed the kids, she said she hated Mondays.
Brenda Ann Spencer was often considered the first school shooter in the United States. Her act inspired many students in the subsequent years.
Her gruesome act earned her indefinite life imprisonment as a punishment, and as of 2017, she is still spending her time behind the bars. She can appeal for a parole in 2019, though.