Dog Day Afternoon - a true story?

Cafe Society
1

I’ve often heard that Dog Day Afternoon is a true story. How true is it? I can’t seem to find any info on what that true story actually is, names, particulars, etc.

2

See here for the facts and aftermath.

3

Thanks for the link, though here’s the correct url if anyone else wants to follow it. Now that I know the real man’s name, info is a lot easier to find. This page has some info.