A simple spelling mistake on a computer database meant police missed crucial details about a man's violent past, just hours before he killed his partner.
Sarah Gosling was stabbed to death in Newcastle earlier this year. Now, the police watchdog has criticised mistakes by Northumbria police, which it says had "profound consequences."
You can see the full report from Ben Chapman below.
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Emma Jesson brings you Sunday night's forecast
Wet and windy spells, interspersed with drier interludes this week. Breezy with wintry showers, variable temperatures and a weather warning
Mostly cloudy, some bright spells, rain on and off and blustery. Milder temperatures than on Saturday