Dick Holland, the surviving senior officer in charge of the original investigation, said: 'Words can't express the regret I feel for the family and for Kiszko, now it has turned out he is innocent. But the enquiry was done diligently and honestly within the terms that were legally and scientifically available. After Kiszko's arrest, the forensic science service received a hanky which may have had seminal stainings from Kiszko. After his arrest, he produced a sample in the presence of his solicitor and doctor which was sent to the laboratory for comparison. Now how much further can you go?'