A 13-year-old rape and murder victim who was found unresponsive in a teenage boy’s bedroom suffered ‘multiple cardiac arrests’ before dying.

An inquest heard Casey-Louise Horrocks died in hospital after being found in the 16-year-old boy’s bedroom, in Huddersfield, West Yorkshire, on August 11.

After a post-mortem, her cause of death is still unknown.

West Yorkshire Police launched a double rape and murder enquiry after the schoolgirl, a pupil at Mossley Hollins High School in Manchester, died a day after being found.

The teenage boy, from Huddersfield, was arrested on suspicion of the rape and murder of Casey-Louise and the rape of a 16-year-old girl in his home town has been released on conditional bail.

Today, an inquest into Casey-Louise’s death was opened by the assistant coroner but was suspended for six months while West Yorkshire Police investigate.

Coroner’s officer Victoria Normington said: ‘The brief circumstances of her sad death are that the Yorkshire Ambulance Service were called to a house in Huddersfield regarding an unresponsive teenager.

‘CRT [cardiac resynchronisation therapy] was commenced, and Casey was admitted to the Calderdale Royal Hospital, where she was initially unresponsive and unconscious.

‘She was taken for scans, and CPR was commenced as she then suffered four cardiac arrests. She was sadly pronounced dead at 2.18 am.’

Casey-Louise was formally identified through photographic evidence given to detectives.