The lawsuit that prompted the review of the ion scans in the State of New York, and then subsequently more broadly across the Federal Bureau of Prisons, revolved around the question of access and a family being denied access because of false positives. The court agreed, and they initially did find that there was an issue of false positives there. The Federal Bureau of Prisons decided to stop using them. They used them only for mail and for inmate belongings, and they would swab visiting rooms before and after visits. I'm not sure what the purpose of that was.
They did, surreptitiously and under the radar, reintroduce the use of the ion scans in 2011. Some prisons started scanning people again. I've been monitoring the prison rights groups in the United States. It continues to be an ongoing issue. Again, there's the question of whether this should be a human rights lawsuit.