Assume ID is true

I'm not sure if this is off-topic or not, but there's something I've wondered about ID.If something like the bacterium flagellelum was designed - especially by something non-supernatural - then why aren't people also looking for evidence of how the design was implemented ? Is it just that DNA manipulation (taking a total flyer on how you'd do it ) at some point in the ancient past would leave no trace in the present ?

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Confused ? You will be...

I realise that - sorry I didn't make myself clearer.What I was talking about was some evidence of the mechanism by which the DNA was changed rather than the physical changes arising from the change in the DNA.For example I mentioned in an earlier thread the bacteria which were genetically modified to produce human insulin back in 1982. I don't know if you can tell by analysing these bacteria that they have been engineered, but if you can that's the sort of thing I meant.

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Confused ? You will be...