The Police Ombudsman says the PSNI investigation into the death of Katie Simpson was “flawed and failed her family”.
The 21-year-old died in hospital a week after an incident near Drumahoe, Co. Londonderry, in August 2020.
The PSNI initially accepted the word of her sister’s boyfriend Jonathan Creswell that he had found her trying to take her own life.
In reality, he had viciously attacked her. It’s believed he drove Katie back and forth across the border while repeatedly attacking her in a jealous rage.
Despite Creswell’s violent history and physical marks of abuse on Katie, local police failed to question others on Katie’s life, and no forensic examination took place.
He was later charged with her murder but ended his life one day into his trial earlier this year.
Ciarán Dunbar is joined by Belfast Telegraph crime correspondent Allison Morris.