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."
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A Domestic Homicide Review is now set to be carried out after Bennett murdered his current and ex partners
The cadets are visiting over 300 homes in Wallsend to deliver leaflets and give residents crime prevention advice on their doorstep.
Alan Bennett killed Jodie Betteridge in front of her three children Teesside Crown Court heard. He had earlier killed partner Lynne Freeman