In February 2019, the city of Rio de Janeiro announced that its police security operation for the annual five-day Carnival would include facial recognition and vehicle license plate cameras to identify wanted individuals and cars. Municipal officials said the system would help reduce thefts and robberies; critics dissented on the basis that a period when people are wearing masks, heavy makeup, glitter, and costumes is a bad time to test the technology.
https://riotimesonline.com/brazil-news/…