Can you give an example of a documentary where the person telling the story believed it to be true, but it turned out to be false?

Read also:

• My cantankerous beagle is very badly behaved at the dog park and always starts barking at the other dogs. Would pepper spray be an effective method to correct his inappropriate behavior?
• Why is rap* a crime?
• How do I build rapport with anybody?
• ‘We tried and it didn’t work out’: CDPR co-founder says it shouldn’t stray from AAA open-world RPGs - Video Games Chronicle
• Is it possible to become homeless after being released from jail or prison in the United States?
• What have I done wrong? How can I start over?
• What’s a historical event you wish more people talked about?
• Novartis Pluvicto™ demonstrates statistically significant and clinically meaningful rPFS benefit in patients with PSMA-positive metastatic hormone-sensitive prostate cancer - Novartis
• Is the Moon the Next Billionaire’s Playground? A Trillion Dollars Worth of Platinum Is Waiting - The Daily Galaxy
• What are some of your shocking stories?
• Byron Allen Puts His Local TV Stations Up for Sale - The Hollywood Reporter
• Why do people always talk about Ohio as it's a dangerous city?