With two shocking and tragic examples already today, I wanted to mention a few things that might help you see this in the charts of the instance in New Orleans and near that Trump tower. For the idea of a mass killing: Unruh #24045; the matter of “to kill”: Leto #68. Where there is an explosion, check the TNP and the asteroid, Zeus. The asteroid Nobel #6032 can also indicate an explosion. Of course, both the Zeus points can also stand for Fire.
While we usually use Erigone #163 for suicide, there are a number of other points for it. See Lucretia #281 and Antigone #129.
But the matter of a Murder-Suicide event can also be shown by the factors Brown #1643 and/or Hirsch #14214. The research on those who Murder and then commit Suicide has indicated brain changes by such things as: psychosocial stressors, depression, financial difficulties, drug or alcohol addiction, a psychotic episode or other psychiatric disorders.
If you wish to review a Mass Killing-Suicide case, check the chart of Thomas Hamilton, born May 1, 1952 at 8:50 am in Glasgow, Scotland. He murdered a group of children and then killed himself on March 13, 1996 in Perthshire, Scotland.
Many such events involve guns and not cars or trucks but to see the Tesla Cybertruck used today, see Tesla #2244. There are points for trucks in the Mundane section of Research Access. Also there you will find points for Sadism and such. You may find the asteroid, Melpomene #18, useful as it stands for Tragedy. The idea of Terrorism can be represented by the asteroid, Jacobi #12040; on January 1, it was in 11 Capricorn with the transiting Sun conjunct!
I have used these points for Islam/Muslim: Al Chwarizmi #13498, Al Khwarismi #11156 and Al-biruni #9936 for Muslim/Islam. You will find one with the Sun for this event!
Even if you don’t do charts for such events, if you (of course you do) your monthly Lunar Returns, both Tropical and Sidereal, and note the angular (to return chart angles) points both radix and transit, and if you reacted to this event, some of the relevant points will be angular on your returns.
It’s hard to say Happy New Year after these horrible events.