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Only four of the 12 people arrested met the evidential threshold to bring charges, according to the Crown Prosecution Service.

The force added that it had been a "complex investigation" and all "evidential opportunities" had been explored.

Mrs Anderson said they should have been kept by the police "for evidential purposes in respect of unsolved murders, including Mr O'Hara's".

It also acknowledges that the current legislation is too severe and has provisionally proposed that claimants could still be asked to prove their innocence, but be expected to meet a lower evidential threshold.

Rose, a self-described spiritual evidential psychic medium and spiritual healer, is considered by many in the room as one of the best, and they should know.