Northumbria Police has responded to criticisms it didn't properly investigate a woman's reports she was being stalked by her ex-boyfriend who went on to murder her.
Assistant Chief Constable Rachel Bacon says the force has learnt it didn't fully understand the nature of stalking and that it wasn't recording enough crimes reported as stalking.
Alice Ruggles was killed by Trimaan Dhillon in Gateshead in 2016. Dhillon was later jailed for life.
The Independent Office for Police Conduct has now found two officers had cases to answer for misconduct, while there was evidence of 'unsatisfactory performance' by another constable.
Northumbria Police says they've now had more training.
Watch Assistant Chief Constable Rachel Bacon: