Last year, Chinese police arrested a man at a pop concert after he was flagged as a criminal suspect by a facial recognition system installed at the venue. The software that called the cops was developed by Shanghai startup Yitu Tech. It was marketed with a stamp of approval from the US government. Yitu is a top performer on a testing program run by the National Institute of Standards and Technology that's vital to the fast-growing facial recognition industry. More than 60 companies took part in the most recent rounds of testing.

On Tuesday, a group of 90 advocacy groups penned a letter to Amazon, Google, and Microsoft, requesting that the companies pledge not to sell facial recognition technology to the government. The American Civil Liberties Union (ACLU), the Refugee and Immigrant Center for Education and Legal Services (RAICES), and the Electronic Frontier Foundation (EFF) were among the groups that pressed these companies. The letter marks mounting pressure on some of Silicon Valley's most influential companies and their ramping efforts to build facial recognition systems. "We are at a crossroads with face surveillance, and the choices made by these companies now will determine whether the next generation will have to fear being tracked by the government for attending a protest, going to their place of worship, or simply living their lives," Nicole Ozer, technology and civil liberties director for the ACLU of California, said. Recently, Google and Microsoft have acknowledged the risks involving facial recognition services and their potential for misuse and surveillance by bad actors.

The Orlando Police Department is one of the law enforcement groups that has been testing Amazon's facial recognition service Rekognition, using it in its headquarters and in downtown Orlando, though supposedly only with officers that agreed to test the system. However, the pilot program expired last week and the department says it has not yet decided to renew it. "Staff continues to discuss and evaluate whether to recommend continuation of the pilot at a further date. At this time that process in still ongoing and the contract with Amazon remains expired," the city of Orlando and the police department said this week in a joint statement given to Floridapolitics.com. Amazon and the city of Orlando have received pushback over the program, with those opposing it expressing concerns over the ample potential for its misuse.