Arrest following pedestrian injury

[Rick101]

Just read this in the local rag.

http://www.yorkpress.co.uk/news/15059520.UPDATEDWoman__85dies_after_being_trapped_under_lorry/?ref=mr&lp=1

From what I can make out the lady was a pedestrian and has somehow ended up under the vehicle.
I was surprised to read the driver had been questioned but not arrested. , maybe wrongly, thought in instances like this with serious injury the driver would be arrested as a matter of course.
The only thing I can think it that the initial injury was thought to be small and subsequently became more complicated.

https://northyorkshire.police.uk/news/appeal-witne...

[Elroy Blue]

If there's no necessity to arrest, then you don't arrest. Investigation, witnesses may negate the end