Protection of Freedoms Bill

Does the Minister know of any innocent person who has been negatively affected by the placing of his details on a DNA database? This is a question of balance. The Government's main aim appears to be to ensure that the DNA of someone who has not committed a crime is not put on the database, but as far as I know that does such people no harm. Surely a greater danger is posed by the person whose DNA should be on the database but is not, and who then commits a crime that is not detected.