<http://www.bbc.com/news/uk-wales-south-west-wales-44007872> More than 2,000 people were wrongly identified as possible criminals by facial scanning technology at the 2017 Champions League final in Cardiff. South Wales Police used the technology as about 170,000 people were in Cardiff for the Real Madrid v Juventus game. But out of the 2,470 potential matches with custody pictures - 92% - or 2,297 were wrong. Chief Constable Matt Jukes said officers "did not take action" and no one was wrongly arrested. South Wales Police have made 450 arrests in the last nine months using the automatic facial recognition (AFR) software, which scans faces comparing them to about 500,000 custody images <http://www.bbc.co.uk/news/technology-39735637>. * Policing Champions League final in Cardiff cost £5.7m <http://www.bbc.co.uk/news/uk-wales-south-east-wales-43410104> * Champions league brings record-breaking numbers to Cardiff <http://www.bbc.co.uk/news/uk-wales-south-east-wales-40259821> The technology has helped the force convict a criminal to six years in prison for robbery while another got four-and-a-half years imprisonment for burglary. But facial recognition was wrong on 92% of the faces it matched on the day of the Champions League Final, with 2,297 incorrect matches according to data on the force's website <https://www.south-wales.police.uk/en/advice/facial-recognition-technology/>. [...]