Maine Could Seriously Limit Use Of Facial Recognition Technology Over the last decade, we have seen a significant increase in the use of facial recognition software by law enforcement. The technology is no-longer just a tool of federal agencies like the CIA, FBI, and Homeland Security. The technology is no way more commonplace. Not surprisingly, some people are concerned about how prevalent the technology is becoming. In fact, the City of Portland has already put restrictions on the use of facial recognition technology. Now, some Maine legislators want to limit how and when the technology can be used by police and other law enforcement agencies in Maine.