WSDOT says it’s a 30mph curve.
The train was doing 81.1mph.
It would not matter if there was something on the track or not.
I don't claim to be an expert, so I can't say they are wrong. I'd sure be looking for something besides speed.
Just because a guy was speeding, it doesn't mean the derailment had to be related to it. It would obviously be an area of interest.