A NEW police investigation could be opened to discover who was responsible for Mayra Cabrera's death.

At the time, prosecutors decided there was not enough evidence to follow up criminal investigations into Mayra's death - shortly after she had given birth - but it is thought that new evidence, which came to light during the three-week inquest could help to build a case.

The Crown Prosecution Service will now decide whether there is enough evidence to charge individual hospital staff, or the Swindon and Marlborough Hospital's Trust with manslaughter.

Detective Inspector Ian Saunders, of Swindon CID, said: "I'm to produce copies of all the evidence gathered during the inquest, and post down to the CPS a bundle of papers. They will review the case and decide whether to change their minds.

"We did investigate Mrs Cabrera's death, but at the time the CPS decided there was insufficient evidence to proceed."

Swindon police started their investigation in November 2005.

Hospital staff were interviewed and an expert witness brought in to analyse the complicated medical evidence.

In July 2006 the case was passed to the CPS's special crime division in London. In January 2007 the CPS dropped the case on the grounds that there was insufficient evidence to charge anyone.

Det Insp Saunders said that if given the go-ahead by the CPS, officers would reopen their manslaughter enquiry.

"We would be looking at manslaughter on the grounds of gross negligence against an individual and a corporate body, in other words the Trust," he said.

Mayra, 30, died when a bag of Bupivacine, an anaesthetic for epidural use only, was injected into her hand instead of her spine.

The inquest heard that negligent storage of Bupivacaine caused the fatal administration.

A jury returned a verdict of unlawful killing at Trowbridge Coroners' Court on Tuesday.

The Swindon and Marlborough NHS Trust has admitted liability for the drugs blunder that caused her death.

Mayra's widower Arnel said after the verdict that it would only be true justice if a prosecution for manslaughter was obtained.

His solicitor Seamus Edney said: "I believe this is the first time a jury has given an unlawful killing verdict against a Trust.

"This is hugely groundbreaking and legal history."