Alright, just saw a picture of the engine and it did not look like it severely impacted something, no blood so not even a person.
Something caused the engineer to deaccelerate and the train to derail (also causing the catenarys to cross causing a large explosion of sparks). The next car jackknifed and the following car hit somthing, maybe a bridge support.
If the engineer was alert enough to brake like that then I have a hard time seeing it as his/her fault. Also it just left PHL and was coming into Trenton so I have a hard time believing he wasn’t alert.
A problem with the track is very hard to see from the engine so it would have been something obvious for the engineer to brake.
A train derailer is bright yellow.
Thanks for your observations.