As someone who has had a relative murdered with this procedure, not next of kin so couldn’t do anything to stop it, I can confirm the condemned are indeed allowed to die of dehydration & hunger.
Not only that though they’re put into a drug induced coma to stop them saying anything to anyone.
BBC4 broadcasts – of How to Have a Good Death
BBC Radio 4
The Liverpool Care Pathway is a guide to giving people the best possible death.