A former top police officer from Scotland Yard has joined the investigation into the disappearance of Disney cruise ship worker Rebecca Coriam.

The Liverpool student went missing while employed as a youth activity worker on board the Disney Wonder as the vessel sailed into Puerto Vallarta, in Mexico, in March 2011.

After nine months, the investigating Bahamas police department declared the 24-year-old’s disappearance as “not suspicious”.

Rebecca Coriam from Guilden Sutton went missing on a Disney cruise ship
Rebecca Coriam

Disney insist Rebecca, who studied childhood studies, psychology and philosophy at Liverpool Hope University , was swept overboard.

But Rebecca’s family think she may have been killed , and in November private investigators disclosed their belief that “criminal activity” was behind her disappearance.

Now, Roy Ramm, who spent 27 years with the Metropolitan Police, has joined the team trying to figure out what happened on the cruise ship almost five years ago.

He is a former Commander of Specialist Operations at Scotland Yard and has worked on homicide and missing person investigations,

Mr Ramm volunteered to help with the case after reading media coverage last year.

Mike and Ann Coriam, parents of Rebecca Coriam who disappeared whilst working on a Disney cruise ship
Mike and Ann Coriam, parents of Rebecca Coriam

Chester MP Mr Matheson, who is co-ordinating the investigation, believes there is a “real possibility” that 24-year-old Rebecca was murdered.

He said: “We are really grateful that Commander Ramm has offered to assist us with this investigation. He was one of the most senior police officers in the country and is a hugely experienced detective. His expertise and knowledge will be invaluable.

“Bringing Roy into the team feels like we are now moving the big guns on to the field of play.”

Rebecca, who originally came from Guilder Sutton, but also lived near Penny Lane in Wavertree, was last spotted in the crew lounge of the Disney ship where a CCTV camera showed her on the phone , during which she appeared to get upset.

Her credit card, which was not found among her personal belongings, was used two months after she went missing.