To summarize in brief:
The British Post Office scandal, also called the Horizon IT scandal, involved Post Office Limited pursuing thousands of innocent subpostmasters for shortfalls in their accounts, which had in fact been caused by faults in Horizon, accounting software developed and maintained by Fujitsu. Between 1999 and 2015, more than 900 subpostmasters were convicted of theft, fraud and false accounting based on faulty Horizon data, with about 700 of these prosecutions carried out by the Post Office. Other subpostmasters were prosecuted but not convicted, forced to cover Horizon shortfalls with their own money, or had their contracts terminated. The court cases, criminal convictions, imprisonments, loss of livelihoods and homes, debts and bankruptcies, took a heavy toll on the victims and their families, leading to stress, illness, family breakdown, and at least four suicides. In 2024, Prime Minister Rishi Sunak described the scandal as one of the greatest miscarriages of justice in British history.
Link: https://en.m.wikipedia.org/wiki/British_Post_Office_scandal
Takeaways: That the government/post office knew the software was flawed, and nevertheless made hundreds of it's employees scapegoats, with criminal convictions, lost wages, opportunities, credibility, and in worst cases lost lives.
This is peak Great Britain, only maybe remove the great. And - it's easy to see a miscarriage of justice happening overseas, but don't for a moment think it couldn't, wouldn't, or isn't happening as you read this here.