Dimitrios Pagourtzis, the Santa Fe school shooter, was born 12 October 2000 (media sources). He appears to have been quiet, intelligent, reasonably athletic, church-going with no red flags in his background to suggest violence. Though he appears to have been interested in World War 11 kamikaze pilots and wore Nazi and communist symbols on his coat. He used his NRA enthusiast father’s guns.
He is a Sun Libra trine Jupiter trine Uranus, so would have a good brain – though an Air Grand Trine can indicate a fervent ideologue; and that forms into a Kite with Jupiter opposition Pluto, giving him the confidence to assume rules don’t apply to him and bring him into clashes with authority.
In addition he has an extremely volatile Mars in Virgo on the focal point of a Mutable T Square to Jupiter opposition Pluto and perhaps on the focal point of a Yod inconjunct Uranus sextile an Aries Moon. Such a Mars is high-wire, easily triggered, scattered and inclined to be overly reckless. Mars Jupiter tends to take risks, and Mars Pluto can be ruthless. Plus he has Venus, Mercury in intensely emotional Scorpio with Mercury in an impulsive square to Uranus.
At the moment tr Neptune is squaring his Mars, which usually brings a panicky sense of failure; and he’s had the challenging and stressful tr Pluto square his Sun through this year. The catalyst for this may have come in April when tr Uranus was opposition his adventurous Mars/Jupiter and ‘catastrophic’ Mars/Pluto.