CCTV captures sickening moment knife-wielding man slashes ex's throat

CCTV captures sickening moment knife-wielding man slashes ex's throat. Rosie Niessen, 28, left for work as a prison officer when her ex-partner, Simon Scrimshaw, then 50, came up behind wielding a Stanley knife. He slashed her throat and hacked her face, neck and hands as she fought back.