Government could use 5th amendment clause protecting against expropriation. It just establishes that the government has to give compensation to assume control of property, when no charges have been filed against the person or the person's property.
With DNA being part of a human being, it wouldn't make sense for the government to circumvent that amendment with civil forfeiture as it does with non-human property.
With DNA being part of a human being, it wouldn't make sense for the government to circumvent that amendment with civil forfeiture as it does with non-human property.