In all the pics I have seen so far, I don’t see the Prius. Read that it slowed down 200 feet before the intersection, but that isn’t necessarily bad. Might have been anticipating to make a left turn and slow to slide into the left turn lane or anticipating the light to turn.
https://m.youtube.com/watch?v=gNbamMWZ8M4
You can see the Prius in this video at about the 00:50 point.