“The vast majority of people in ICE custody have no criminal conviction, and residing in the U.S. undocumented is typically a civil, not criminal, offense,” Wired reports.“Yet once the DNA profiles of detained people enter the FBI’s Combined DNA Index System, or CODIS, law enforcement agencies across the country can compare them against evidence from unsolved crimes—and against crime-scene DNA collected years or even decades from now. The physical sample, which holds a person’s entire genome, sits in a federal laboratory indefinitely.”