Terminology. Parade Crash or Accident?
I see why some ppl think those terms do not accurately describe the events or actions; I agree.
First "crash" and "accident" suggest a
single point of impact, not a scene w dozens of strikes, covering several city blocks. And "accident" suggests circumstances beyond the driver's
control.
Synonyms I saw for crash do not convey the right notion (Thanks anyway,

Monsieur Roget).
Collision, maybe, but still seems to be a single event.
Pile up, maybe, seems to apply to multiple vehicles, not victims along several blocks.
Wreck, IDK.
Not thinking of better alternative to either word. my2ct
I may be overlooking some alternatives. Regardless of MSM's description, a tragic day for everyone.
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Other phrases?
In traveling thru parade, DB drove in such a way that his car struck participants and bystanders.
Factual (unless someone else was at the wheel).
Nope, waaay too long for headline, awkward length for other sentences.
Or?
DB went on a murderous spree.
Nope, not in MSM. That suggests/concludes he had the intent necessary to criminally cause deaths & injuries. No trial, no conviction. Has not yet been proven in court.
Or?