There is unsurprisingly an extensive account at https://en.wikipedia.org/wiki/Ford_Pinto#Fuel_system_fires,_...
The 'crime' of the pinto was not that it was an unsafe car (it wasn't), it was that it could have been safer with a minimal (even by my standards, and I'm on the record as being opposed to mandatory backup cameras) increase in cost - that was why it grew the reputation, it was pure cost engineering (aka, cheapness - on the same level as the ignition switch failure issue GM had in the 2000's).
People died, a fair number of them - because Ford didn't want to spend an additional amount of money - less than 50USD in today's money - on a car that retailed for 15,000USD in todays money.