DHS has successfully tested a pre-crime detection scanner on humans. The scanners gauge facial expressions and other biometric data to detect whether someone is giving cues for mal-intent. The DHS algorithm also includes scanning a person’s gender, ethnicity, breathing, and heart rate in a non-intrusive way through video and audio scanning. Critics want to know whether Americans agree that it is worth their safety interests to be watched in every public space, or will pre-crime scanning cross certain privacy rights?