In the UK we've just had many Postmasters/mistresses convictions quashed. The PO prosecuted and ruined hundreds in the belief thar the Horizon computer system couldn't be wrong.
Someone was done for a parking fine because robots spotted them entering a car park but didn't twig they had only been there twice for a moment and not continuously.
Again the computer was believed rather than the individual. Why? Justice came to both eventually but why should a computer be presumed infallible?