Name, age, city is pretty common; especially name and age of someone arrested. I'd imagine it public records.
Some quick googling for recent examples. I just looked for news articles, not sure what if the police release has more residency info on the ones that aren't listed in the articles.
https://www.latimes.com/california/story/2023-02-17/suspect-... - name and age
https://www.fox32chicago.com/news/2-chicago-men-charged-in-d... - names, ages, city
https://apnews.com/article/entertainment-music-shootings-arr... - name and age