DNA "Sweeps" ineffective: UNO Study

Mass DNA sweeps through large populations to identify suspects in criminal investigations raise your paranoia level and make you think Minority Report is real life, but a UNO report last year concluded from studying the known instances of mass dna testing that it has been ineffective. The murder of Christa Worthington in Jan 2002 in a Cape Cod Massachusetts community brought not only salacious scandal but also national attention to law enforcements decision to test men in the small community there. The suspect the police eventually arrested had given his sample shortly after the crime, a year before the authorities initiated the mass sweep of dna samples. Collecting large dna databases certainly will deter future behaviour but also could chill "rebellious" behavior. After all we live in an open society and interact with many other people in our daily lives. Who is to say that even the parson's dna could somehow end up on or in the rape and murder victim? Those with prior records will be particularly singled out and browbeaten solely because some dna appeared near a crime scene.