I'm in favour of it. It would be a way of catching the sort of rapist who jumps out and assaults.

If detection was a certainty - we could focus our minds as to why we are turning out so many of these strange criminals and murderers.

DNA used to be a luxury item in the detectives toolkit. When it was first used in the Pitchfork murder case in Leicestershire, England - it took weeks and was very expensive.

About twenty years ago - i was amazed when the police tested our house for the burglars dna (he had cut his finger breaking into our house). It was completely routine by then. The detectives first line of enquiry almost.