[Gayle]

I am always sceptical of medical science. Things that are proven to be 100% often show up a few years later to have flaws.

I believe that someone will declare DNA testing 100% foolproof at some point but the problem is that it won't be! Then the problem will be how do you prove your innocence because you don't have to simply prove that you're innocent but you actually have to prove that the entire system could be flawed.

So from a criminal/police perspective I am very wary of a DNA database.

However, I do think that routine testing of DNA when a child is born could help prevent certain illnesses later in life if it is shown that some people may have a predisposition to them.