The IPCC said: "The report is highly critical of Durham Constabulary and publication of the IPCC's findings will take place after the inquests."
"We are unable to comment further on any specific findings at this stage."
More top news
Mostly fine and dry with sunny spells for the rest of Saturday. Cloudier, cooler with the risk of rain/drizzle into Sunday
A lorry driver from Northumberland has been found guilty of trying to smuggle half a million fake pound coins into the UK.
Almost 100 years after a group of trainee teachers arrived at the frontline in Ypres, a County Durham-born historian will tell their story.