http://www.abc15.com/news/national/video-car-slides-into-trumps-motorcade-route-after-brakes-go-outEven if the cause was bad brakes, this isn't talked about at all.
There's a lot of people doing independent investigation into this on the Internets, so therefore very reliable.
But what are the chances something like this happens at the exact moment the Pres's motorcade is coming by? Further, the map doesn't look very conducive to having the car come out this way.