A mate pointed me at this historic 1979 US shooting in San Diego, California - A shooting that is likely better remembered for the song Bob Geldorf wrote about it for the Boomtown Rats ( No.1 in UK and Australia,- but only No.3 here in NZ).
Sixteen year old Brenda Ann Spencer who lived across the road from the Grover Cleveland Elimentary School, surrendered and pleaded guilty to two murders and assault with a deadly weapon (she shot and injured eight children at the school). While holed up in her home, prior to surrendering and her arrest, a reporter telephoned her and asked "why" - to which she answered "I don't like Mondays".
The Wikipedia page reports that the sixteen year old girl lived in poverty with her father - sleeping together on a single mattress on the floor surrounded by empty alcohol bottles.
Prior to the shooting she had a psychiatric evaluation requested by her Probation Officer - following an arrest for shooting out of the school windows with an air gun - but her father refused to allow her to be admitted to hospital for treatment.
A few days later her father gave her a Ruger 10/22 rim-fire rifle fitted with a telescopic sight and 500 rounds of ammunition for Christmas. - then January 29th she used that gun to commit the shootings. Spencer later said "I asked for a radio and he bought me a gun".
In prison Spencer was diagnosed and treated for epilepsy and depression - and had been found earlier to have an injury to the temporal lobe of her brain - and then again later - after self harming (when her girl friend was released from prison) she was found to be psychotic and unfit for release.
I would be interested to learn her IQ. as many US prison inmates are said to properly be found to be mentally handicapped rather than criminal.
Some thirty-seven years later it seems that she is still held in prison.
Blame it on the guns?
I have given much consideration to the condition of "anti-gunners" and their thinking. - I reckon they are simply confusing their anti-violence feelings and anti-crime wishes and blending them into a 'catch-all' ban the guns cry.