A proposal in Georgia could allow DNA to be collected from immigrants taken into custody for minor offenses. The bill awaiting a final vote in the state legislature would make Georgia the third state to single out immigrants believed to be in the U.S. illegally for the collection of genetic materials that wouldn't be taken from others. Supporters say DNA helps solve crimes. But critics say the legislation could create a two-tier system based on perceived immigration status. Legal experts question whether federal immigration detainers meet Fourth Amendment standards for DNA searches.