http://sls.iykpqm7jiradoeezzkhj7c4b33g4hbgfwelht2evxxeicbpjy44c7ead.onion/technologies/biometric-surveillance
Other vendors include Face Forensics , DataWorks , Rank One Computing , and Neurotechnology , which includes tattoo recognition in its MegaMatcher collection of biometric tools. Notably, multiple universities have worked to develop this technology for use by law enforcement and private industry.