Mugshots end up online because they are public records, and data scrapers...

https://foxtrot-wiki.win/index.php/The_Anatomy_of_an_Industry:_How_Scrapers_Flood_Google_with_Mugshot_Pages

Mugshots end up online because they are public records, and data scrapers automatically feed them into third-party sites to drive ad revenue. This digital footprint can feel overwhelming, but you can take control