The Marshals Service used millimeter wave technology to collect images . Marc Rotenberg of the Electronic Privacy Information Center conceded that the Marshals Service 's images are `` not particularly revealing '' but said this experience highlights the necessity for prohibitions on government 's use of backscatter technology , which can capture far more revealing images by using X-rays to provide detailed images in or under a person 's clothing . ` They were able to do this because the devices are small and can be hidden in a person's body, but they also had access to all of your personal information including where you live, what time it is A sampling of the ghost-like images was obtained under the Freedom of Information Act . The Marshals Service says the images were never accessed before the request .
The Marshals Service used millimeter wave technology to collect images . They were able to do this because the devices are small and can be hidden in a person's body, but they also had access to all of your personal information including where you live, what time it is A sampling of the ghost-like images was obtained under the Freedom of Information Act . The Marshals Service says the images were never accessed before the request .