https://www.nhtsa.gov/file-downloads?p=nhtsa/downloads/FARS/
In fact, the author of the website "I mapped almost every.." might want to add references to the data sources for credibility and less of a "spam" look. How about an About page.
The splash photos on that website says it all.
So we're slowly forgetting that FTP and HTTPS aren't the same thing.
https://www.nhtsa.gov/file-downloads?p=nhtsa/downloads/FARS/