Wikipedia:Articles for deletion/Michael Riordan (police officer)
Per , you have to have held a major non-local office or have significant press coverage to qualify for notability. While I am wary of , I think the Google Books results page is a good start to finding more sources. But even a passing mention in https://web.archive.org/web/20200127070634/http://www.sfmuseum.org/war/44.html this timeline from the San Francisco Historical Society indicates that there is probably potential more coverage that isn't on the internet, which would qualify for the latter of 
— User:BriefEdits, 21:03, 11 June 2021 (UTC)
Stance: keep
Cited policy: WP:POLITICIAN||WP:MEMORIAL||WP:POLITICIAN (Wikipedia:Notability)